AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON MARCH 30, 2001

                                                      REGISTRATION NO. 333-50760
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                           --------------------------


                         POST-EFFECTIVE AMENDMENT NO. 1
                                       TO
                                    FORM S-3


                             REGISTRATION STATEMENT

                        UNDER THE SECURITIES ACT OF 1933

                           --------------------------

                           JUNO ONLINE SERVICES, INC.

             (Exact name of registrant as specified in its charter)

                           --------------------------


                                                      
                       DELAWARE                                                13-3914547
            (State or other jurisdiction of                      (I.R.S. Employer Identification Number)
            incorporation or organization)


                                 1540 BROADWAY
                               NEW YORK, NY 10036
                                 (212) 597-9000
              (Address, including zip code, and telephone number,
       including area code, of Registrant's principal executive offices)

                         ------------------------------

                                 CHARLES ARDAI
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                           JUNO ONLINE SERVICES, INC.
                                 1540 BROADWAY
                               NEW YORK, NY 10036
                                 (212) 597-9000
           (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

                         ------------------------------

                                   COPIES TO:
                            BRIAN B. MARGOLIS, ESQ.
                        BROBECK, PHLEGER & HARRISON LLP
                           1633 BROADWAY, 47TH FLOOR
                            NEW YORK, NEW YORK 10019
                                 (212) 581-1600

    APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable on or after this Registration Statement is declared effective.

    If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. / /

    If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. /X/

    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. / / ______

    If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following
box and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. / / ______

    If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. / /

                           --------------------------

    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SECTION 8(A), MAY
DETERMINE.

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------


THE INFORMATION IN THIS PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED. WE MAY
NOT SELL THESE SECURITIES UNTIL THE REGISTRATION STATEMENT FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS PROSPECTUS IS NOT AN OFFER
TO SELL THESE SECURITIES AND IT IS NOT SOLICITING AN OFFER TO BUY THESE
SECURITIES IN ANY STATE WHERE THE OFFER OR SALE IS NOT PERMITTED.



                  SUBJECT TO COMPLETION, DATED MARCH 30, 2001

                                        FILED PURSUANT TO RULE 424(B)(3)
                                        REGISTRATION STATEMENT NO. 333-50760

P R O S P E C T U S

                               10,000,000 SHARES

                           JUNO ONLINE SERVICES, INC.

                                  Common Stock

                               ------------------

    The 10,000,000 shares being registered pursuant to the registration
statement of which this prospectus forms a part may be issued through a common
stock investment agreement with The Kingston Limited Partnership, as further
described in this prospectus. We will receive the net proceeds from the sale of
any common stock that we sell through the common stock investment agreement to
Kingston. Kingston may resell those shares pursuant to this prospectus. We will
not receive any of the proceeds of sales by Kingston.

    The Kingston Limited Partnership is an "underwriter" within the meaning of
the Securities Act of 1933, as amended, in connection with its sales of our
common stock hereunder.


    Our common stock is quoted on the Nasdaq National Market under the symbol
"JWEB." On March 29, 2001, the last reported sale price of our common stock on
the Nasdaq National Market was $1.00 per share.


                            ------------------------


    BEGINNING ON PAGE 7, WE HAVE LISTED SEVERAL "RISK FACTORS" WHICH YOU SHOULD
CONSIDER. YOU SHOULD READ THE ENTIRE PROSPECTUS CAREFULLY BEFORE YOU MAKE YOUR
INVESTMENT DECISION.


                             ---------------------

    Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or passed upon the
adequacy or accuracy of this prospectus. Any representation to the contrary is a
criminal offense.

                            ------------------------


                 THE DATE OF THIS PROSPECTUS IS MARCH   , 2001.


                               TABLE OF CONTENTS




                                                                PAGE
                                                              --------
                                                           
WHERE YOU CAN FIND MORE INFORMATION.........................      3

INFORMATION INCORPORATED BY REFERENCE.......................      3

FORWARD-LOOKING INFORMATION.................................      4

OUR COMPANY.................................................      5

RISK FACTORS................................................      7

COMMON STOCK INVESTMENT AGREEMENT...........................     33

USE OF PROCEEDS.............................................     39

SELLING STOCKHOLDER.........................................     39

PLAN OF DISTRIBUTION........................................     40

LEGAL MATTERS...............................................     42

EXPERTS.....................................................     42



                            ------------------------

    YOU SHOULD RELY ONLY ON THE INFORMATION CONTAINED, OR INCORPORATED BY
REFERENCE IN THIS PROSPECTUS OR ANY RELATED PROSPECTUS SUPPLEMENT. JUNO ONLINE
SERVICES HAS NOT AUTHORIZED ANYONE TO PROVIDE YOU WITH DIFFERENT INFORMATION.
JUNO ONLINE SERVICES IS NOT MAKING AN OFFER OF THESE SECURITIES IN ANY
JURISDICTION WHERE THE OFFER IS NOT PERMITTED. YOU SHOULD NOT ASSUME THAT THE
INFORMATION PROVIDED BY THIS PROSPECTUS IS ACCURATE AS OF ANY DATE OTHER THAN
THE DATE ON THE FRONT OF THIS PROSPECTUS.

                                       2

                      WHERE YOU CAN FIND MORE INFORMATION

    We have filed a registration statement on Form S-3 with the Securities and
Exchange Commission under the Securities Act of 1933, as amended, relating to
the common stock offered by this prospectus. This prospectus does not contain
all of the information set forth in the registration statement. Some information
has been omitted in accordance with the rules and regulations of the Commission.
For further information, please refer to the registration statement, including
any amendments thereto, and the exhibits and schedules filed with it. We also
file periodic reports, proxy statements and other information with the
Commission, as required by the Securities Exchange Act of 1934.

    You may read and copy all or any portion of the registration statement or
any other information Juno files with the Commission at the Commission's public
reference room at 450 Fifth Street, N.W., Washington D.C. 20549. You can request
copies of these documents, upon payment of a duplicating fee, by writing to the
Commission. You may call the Commission at 1-800-SEC-0330 for further
information about the public reference rooms. Juno's filings with the
Commission, including the registration statement, are also available to you on
the Commission's Web site at http://www.sec.gov.

    Our common stock is quoted on the Nasdaq National Market, and therefore, you
may read any material that we file with the Commission at the offices of Nasdaq
Operations, 1735 K Street, N.W., Washington, D.C. 20006.

                     INFORMATION INCORPORATED BY REFERENCE

    We have filed the following documents with the Commission and we are
incorporating those documents by reference in this prospectus:


    (1) Our Annual Report on Form 10-K for the fiscal year ended December 31,
       2000 (the "2000 Form 10-K");



    (2) Our Proxy Statement in connection with our Annual Meeting of the
       Stockholders to be held on May 16, 2001;



    (3) Our Current Report on Form 8-K filed on January 24, 2001;



    (4) Our Current Report on Form 8-K filed on January 25, 2001;



    (5) Our Current Report on Form 8-K filed on February 2, 2001;



    (6) Our Current Report on Form 8-K filed on February 15, 2001;



    (7) Our Current Report on Form 8-K filed on March 21, 2001;



    (8) Our Current Report on Form 8-K Filed on March 30, 2001; and



    (9) The description of our common stock set forth in our Registration
       Statement on Form 8-A, filed with the Commission on May 10, 1999.


    All reports and other documents that we file pursuant to Section 13(a),
13(c), 14 or 15(d) of the Securities Exchange Act of 1934 after the date of this
prospectus, for so long as the common stock is being offered pursuant to this
prospectus, as well as all such reports and documents filed after the date of
the initial filing of the registration statement of which this prospectus forms
a part and prior to the effectiveness thereof, are to be incorporated by
reference into this prospectus. The reports and other documents incorporated by
reference are considered part of this prospectus, and the reports and other
documents we file later with the Commission will automatically update and
supercede the information contained in this prospectus.

    We will provide free of charge to each person to whom this prospectus is
delivered, upon written or oral request by such person, a copy of any or all of
the information incorporated by reference in this prospectus but not delivered
with this prospectus (other than exhibits to such documents, unless such
exhibits are specifically incorporated by reference into such document).
Requests for such documents

                                       3

should be directed to Richard Buchband, Senior Vice President and General
Counsel, Juno Online Services, Inc., 1540 Broadway, New York, NY 10036,
(212) 597-9000.

                          FORWARD-LOOKING INFORMATION

    This prospectus contains certain statements that may be deemed
forward-looking statements within the meaning of Section 27A of the Securities
Act of 1933, as amended and Section 21E of the Securities Exchange Act of 1934.
These forward-looking statements are usually accompanied by words such as
"believes," "anticipates," "plans," "expects" and similar expressions. Our
actual results could differ materially from those expressed or implied by these
forward-looking statements. The following factors, among others, could cause
Juno's actual results to differ materially from those described in a
forward-looking statement:

    - our issuances of equity securities in connection with financing
      transactions, including under our equity line facility with The Kingston
      Limited Partnership;

    - our issuance of equity securities in connection with acquisitions of
      subscribers or businesses, or in connection with vendor transactions;

    - our limited history of offering our billable premium services and our free
      basic service in its current form;

    - our history of losses;

    - decreases in the popularity of the Internet among consumers;

    - our dependence on strategic marketing alliances as a source of revenues;

    - continued reduction in demand for Internet advertising space;

    - erosion of collectibility of accounts receivable related to advertising
      sales;

    - our failure to retain or grow Juno's subscriber base;

    - increasing competition from existing or new competitors;

    - any failure to sustain current levels of subscriber acquisition or
      retention;

    - any inability to successfully migrate members to or retain members in
      Juno's billable premium services;

    - increased per-subscriber telecommunications costs resulting from increased
      usage of our services;

    - rapid technological change;

    - the possible unavailability of financing as and if needed, including due
      to the operation of volume or price limits under our equity line facility
      with The Kingston Limited Partnership;

    - possible industry consolidation;

    - our dependence on a limited number of vendors, including, without
      limitation, third-party vendors for customer support services and for the
      provision and roll-out of the Juno Express broadband service; and

    - potential fluctuations in quarterly and annual results.

    This list is intended to identify only certain of the principal factors that
could cause actual results to differ. Please refer to the risk factors described
in the "Risk Factors" section and elsewhere in this prospectus.

                                       4

                                  OUR COMPANY

OVERVIEW

    Juno Online Services, Inc. is a leading provider of Internet access to
millions of computer users throughout the United States. We offer several levels
of service, including free basic Internet access, billable premium dial-up
service and high-speed broadband access, which is currently available in
selected markets. Unlike almost all other Internet access providers, we offer
both free basic and billable premium services, and we believe we are unique in
having converted hundreds of thousands of individuals from free to paying
customers. Our strategy of offering several different service levels and our
easy-to-use, intuitive software are designed to attract a broad spectrum of
users, including those who are just now beginning to explore the Internet.


    Based on our total of 4.0 million active subscribers during the month of
December 2000, we are one of the nation's leading Internet access providers.
Approximately 842,000 of these active subscribers were subscribed to Juno's
billable premium services and as of December 2000, 90% of Juno's active
subscribers had full Web access. Juno had approximately 14.2 million total
registered subscriber accounts as of December 31, 2000.



    Our services are provided nationwide through more than 4,000 local telephone
numbers, which we lease from several providers. These phone numbers can be
reached by the vast majority of the U.S. population without having to place a
long distance telephone call. We derive our revenues primarily from the
subscription fees we charge for the use of our premium services, from the sale
of advertising, and from various forms of electronic commerce.



    We have been a pioneer in providing Internet services since April 1996, when
we launched our basic service, which was the first on the Internet to provide
free e-mail. In July 1998, we introduced our first premium services, which
offered features ranging from enhanced e-mail services to full access to the
World Wide Web, and for which we charged subscription fees. In 1999 and 2000, we
announced a number of major expansions of our services:


    - Our BASIC SERVICE now provides full Internet access for free in addition
      to e-mail.


    - JUNO WEB provides competitively priced premium Internet access,
      supplementing the features of the basic service with free live technical
      support and customer service, priority access to Juno's network and the
      reduction of some forms of on-screen advertising.



    - JUNO EXPRESS is a broadband service designed to provide high-speed access
      to the Internet through a variety of technologies. It is currently offered
      in selected markets around the country. Juno Express is available in
      digital subscriber line and wireless versions. We plan to test a cable
      version of the service in 2001.


    In operating our expanded basic service, we have capitalized on the size of
our existing user base, advantages we believe our technology confers on our cost
structure, and our advertising sales and electronic commerce activities. Our
technology has been designed to maximize hours of consumer contact and potential
advertising revenues while minimizing the number of hours each user actually
spends connected by telephone to our central computers or to the Web, a key
component of our costs. We believe our subscribers spend significantly less time
connected to the Internet each month than those of our largest competitors, in
part because of technology we have developed that enables subscribers to read
and write e-mail offline rather than while connected. Importantly, this
technology allows us to continue displaying highly targetable interactive
advertisements throughout this offline time.


    As of December 31, 2000, more than 400 firms had advertised on Juno. In many
cases, we derive revenues not only from advertising fees but also from
conducting electronic commerce in collaboration with our marketing partners. We
have entered into a number of major strategic marketing alliances,


                                       5


some of which involved multi-million-dollar guaranteed minimum payments to Juno,
such as our multi-year relationships with Qwest and The Hartford. Our
advertising and strategic marketing activities benefit from our ability to
target advertising to selected segments of the Juno subscriber base on the basis
of a wide variety of information obtained from a detailed electronic
questionnaire that must be completed in order to sign up for Juno's basic
service.



    In addition to our advertising and strategic marketing relationships, we
derive revenue from relationships with providers of Web-based content and
functionality. All Juno users begin each Web session on our portal site,
WWW.JUNO.COM, which contains tools, information, and product offers supplied by
a wide range of strategic partners. Companies with whom we have formed this sort
of strategic relationship include Amazon.com, CNET, eBay and LookSmart.




                            ------------------------


"Juno Web" and "Juno Express" are trademarks, and "Juno" and "Juno Online
Services" are registered trademarks of Juno Online Services, Inc. Each
trademark, trade name or service mark of any other company appearing in this
prospectus belongs to its holder.


                            ------------------------

Juno Online Services, Inc. was incorporated in Delaware on July 2, 1996 and is
the successor by merger to Juno Online Services, L.P., which was formed on
June 30, 1995 as a Delaware limited partnership. Our principal executive offices
are located at 1540 Broadway, New York, New York 10036. Our telephone number at
that location is (212) 597-9000. Information contained on our Web sites does not
constitute a part of this prospectus. References in this prospectus to "Juno,"
"we," "our," and "us" refer to Juno Online Services, Inc., a Delaware
corporation, and its predecessor prior to the merger, Juno Online Services,
L.P., a Delaware limited partnership.

                                       6

                                  RISK FACTORS

    YOU SHOULD CAREFULLY CONSIDER THE RISKS DESCRIBED BELOW BEFORE MAKING AN
INVESTMENT DECISION. IF ANY OF THE FOLLOWING RISKS ACTUALLY OCCURS, OUR BUSINESS
AND FINANCIAL RESULTS MAY SUFFER. IN THAT CASE, THE TRADING PRICE OF OUR COMMON
STOCK COULD DECLINE AND YOU COULD LOSE ALL OR PART OF YOUR INVESTMENT.

OUR BILLABLE PREMIUM SERVICES AND OUR FREE BASIC WEB ACCESS SERVICE HAVE A
  LIMITED OPERATING HISTORY AND FACE NUMEROUS RISKS AND UNCERTAINTIES

    We have a limited operating history upon which you can evaluate our business
and our services. We began offering our free basic service to the public in its
original form in April 1996, first offered billable premium services to the
public in July 1998 and expanded our free basic service to include full Internet
access in addition to e-mail in December 1999. As a company in the rapidly
evolving market for Internet services, we face numerous risks and uncertainties.
Some of these risks relate to our ability to:

    - attract and retain subscribers to our free basic service and our billable
      premium services;

    - anticipate and adapt to the changing Internet market;

    - generate revenues sufficient to cover our operating expenses through the
      sale of our billable premium services, through the sale of advertising or
      from other revenue sources;


    - preserve or raise the capital necessary to fund our operations to the
      extent that they are not profitable;



    - control the cost of providing our free basic service by implementing
      measures designed to discourage excessive use of this service, and to do
      so without causing undesirable levels of subscriber attrition;



    - maintain and develop strategic relationships with business partners to
      advertise their products over our services, particularly in light of
      ongoing weakness in the market for Internet advertising;



    - cost-effectively implement a marketing strategy to promote awareness of
      and attract subscribers to the Juno services, should we choose to pursue
      such a strategy;



    - prevent increases and achieve reductions in the rates we pay for
      telecommunications services;



    - respond to actions taken by our competitors and the entry of new
      competitors into our markets;



    - develop and deploy successive versions of the Juno software;



    - operate computer systems and related infrastructure adequate to
      effectively provide our basic service and our billable premium services;



    - provide technical and customer support to our subscribers in a
      cost-effective manner;



    - operate broadband Internet access services, whether independently or in
      collaboration with one or more third parties;



    - manage the billing systems used to invoice subscribers to our billable
      premium services; and



    - attract, retain and motivate qualified personnel.



    Our business and financial results will depend heavily on the commercial
acceptance and profitability of both our free basic service and our billable
premium services. If we are unsuccessful in


                                       7


addressing these risks or in executing our business strategy, our business and
financial results may suffer.



WE HAVE A HISTORY OF LOSSES SINCE OUR INCEPTION IN 1995 AND MAY NOT EVER BECOME
  CASH-FLOW POSITIVE OR PROFITABLE



    Since our inception in 1995, we have not been profitable. We have incurred
substantial costs to create and introduce our various services, to operate these
services, to attract subscribers to and promote awareness of these services and
to build our business. We incurred net losses of approximately $3.8 million from
inception through December 31, 1995, $23.0 million for the year ended
December 31, 1996, $33.7 million for the year ended December 31, 1997,
$31.6 million for the year ended December 31, 1998, $55.8 million for the year
ended December 31, 1999 and $131.4 million for the year ended December 31, 2000.
As of December 31, 2000, our accumulated net losses totaled $279.4 million. We
incurred negative cash flows from operations of approximately $16.4 million for
the year ended December 31, 1996, $33.6 million for the year ended December 31,
1997, $20.9 million for the year ended December 31, 1998, $45.1 million for the
year ended December 31, 1999 and $109.5 million for the year ended December 31,
2000. At December 31, 2000, $0.9 million remained prepaid for advertising that
Juno has the right to display on a third party's media properties. This prepaid
amount was used in January 2001.


    Since we operated as a limited partnership prior to the merger of Juno
Online Services, L.P. into Juno Online Services, Inc. in March 1999, taxable
losses incurred prior to the merger were allocated to the partners of Juno
Online Services, L.P. for reporting on their income tax returns. As a result, we
will not be able to offset future taxable income, if any, against losses
incurred prior to the merger.


    We may not ever be successful in implementing our business strategies or in
addressing the risks and uncertainties facing our company. Even if we do
implement these strategies and address these risks successfully, our business
might not ever become cash-flow positive or profitable. Were we to achieve
profitability for any particular period, we cannot assure you that we would be
able to sustain or increase profitability on a quarterly or annual basis
thereafter.



OUR BUSINESS IS SUBJECT TO FLUCTUATIONS IN OPERATING RESULTS WHICH MAY
  NEGATIVELY IMPACT THE PRICE OF OUR STOCK



    Our revenues, expenses and operating results have varied in the past and may
fluctuate significantly in the future due to a variety of factors. These include
factors within and outside of our control. Some of these factors include:



    - patterns of subscriber acquisition and retention, and seasonal trends
      relating to subscriber usage of our services;



    - the extent to which our reduction in marketing activity to acquire
      subscribers and promote the Juno brand affects our ability to acquire and
      retain subscribers;



    - the timing and effectiveness of any revenue sharing arrangements or other
      strategic alliances into which we enter;



    - the demand for Internet advertising and our ability to collect outstanding
      receivables from our advertisers;



    - seasonal trends relating to Internet advertising spending;



    - capital expenditures related to upgrading our computer systems and related
      infrastructure;


                                       8


    - our ability to protect our systems from any telecommunications failures,
      power loss, or software-related system failures;



    - our ability to integrate operations and technologies from any acquisitions
      or other business combinations or relationships into which we enter;



    - the extent to which we experience increased competition in the markets for
      Internet services, Internet advertising and electronic commerce;



    - changes in operating expenses including, in particular, telecommunications
      expenses and the cost of providing various types of technical and
      non-technical customer support to our subscribers; and



    - economic conditions specific to the Internet, as well as general economic
      and market conditions.



    Since we expect to be heavily dependent on revenues from our billable
premium services in the foreseeable future, our revenues are likely to be
particularly affected by our ability to recruit new subscribers to our billable
premium services, particularly by encouraging users of our free basic service to
upgrade to our billable premium services, and our ability to retain subscribers
to our billable premium services. In addition, our operating expenses are based
on our expectations of our future revenues and are relatively fixed in the short
term. We may be unable to adjust spending quickly enough to offset any revenue
shortfall, which may cause our business and financial results to suffer.



    Due to all of the above factors and the other risks discussed in this
section, you should not rely on quarter-to-quarter comparisons of our results of
operations as an indication of future performance. It is possible that in some
future periods our results of operations may be below the expectations of public
market analysts and investors. In this event, the price of our common stock is
likely to fall.


WE CANNOT PREDICT OUR FUTURE CAPITAL NEEDS AND WE MAY NOT BE ABLE TO IMPLEMENT
  OUR EXISTING FINANCING PLANS OR SECURE ADDITIONAL FINANCING


    Because we expect to continue to incur substantial losses for the
foreseeable future, we may need to raise substantial additional funds in the
future to fund our operations, including our telecommunications and other
service provision costs, subscriber acquisition costs, costs of enhancing or
expanding the range of Internet services we offer and costs associated with
responding to competitive pressures or perceived opportunities. Additional
financing may not be available on terms favorable to us, or at all. If adequate
funds are not available or not available when required in sufficient amounts or
on acceptable terms, we may not be able to devote sufficient cash resources to
continue to provide our services in their current form, acquire additional
subscribers, enhance or expand our services, respond to competitive pressures or
take advantage of perceived opportunities, and our business and financial
results may suffer, or we could be forced to cease our operations entirely. In
light of our historical and expected losses, we are unlikely to be able to raise
significant additional funds through the incurrence of indebtedness. If
additional funds are raised by our issuing debt, we may be subject to
limitations on our operations.



    On October 6, 2000, we entered into an equity line facility with The
Kingston Limited Partnership, referred to in this prospectus as the equity line
facility, pursuant to which we may, subject to certain conditions, be able to
issue up to $125 million of our common stock to Kingston over the course of a
period of up to two years. However, under our agreement with Kingston, they are
not obligated to purchase shares of our common stock unless a number of
conditions have been satisfied. In particular, they generally have no obligation
to purchase shares to the extent that their purchase price on a given purchase
day would be less than $1.50 per share. Since Kingston's purchase price will
generally be 94% of our volume-weighted average trading price during a given
purchase day, Kingston generally will have no obligation to purchase shares on a
given day to the extent that the volume-weighted average trading


                                       9


price of our shares during such day is less than $1.60 per share. Prior to the
reduction of this minimum price condition from $2.50 per share to $1.50 per
share, Kingston agreed to waive this minimum price condition with respect to one
drawdown period, and Kingston may agree to waive the minimum purchase price in
effect from time to time in the future to allow Juno to sell common stock to
Kingston at prices lower than $1.50 per share but Kingston does not have an
obligation to permit such sales, and may grant or deny such waivers in its sole
discretion. Even if Kingston does grant such a waiver in a particular case and,
at Juno's request, sets a new minimum purchase price lower than $1.50 per share
for a given drawdown period, there can be no assurance that Juno will meet such
new minimum trading price condition to our ability to draw down funds for all or
any portion of such drawdown period.



    In addition to price-related limitations, Kingston generally has no
obligation to purchase shares on a given day to the extent that such purchases
would exceed specified limitations based on our trading volume. Also, the equity
line facility provides that Kingston may not purchase a number of shares that,
when added to all other shares purchased under the facility, would exceed 19.99%
of the number of shares of our common stock issued and outstanding on
October 6, 2000 unless either we obtain stockholder approval of issuances under
the facility in excess of that amount, or Kingston is advised by counsel that
the rules of the principal market or exchange on which our shares are quoted or
listed would permit such an issuance without stockholder approval. As of
October 6, 2000, we had a total of 38,944,360 shares of common stock issued and
outstanding, 19.99% of which would be 7,784,978 shares. We have requested
stockholder approval for sales under the equity line facility of up to
12,000,000 shares in connection with our annual meeting scheduled for May 16,
2001. As of March 2001, we had issued 317,400 shares of our common stock under
the equity line facility for aggregate net proceeds of $498,641.



    We have also entered into several transactions pursuant to which we have the
right to pay for goods or services using our common stock, and we may enter into
more such transactions in the future. If we raise additional funds, acquire
assets, or obtain goods or services through the issuance of equity securities,
stockholders may experience significant dilution of their ownership interest and
the newly issued securities may have rights superior to those of our common
stock. The dilutive effect of these issuances will be increased to the extent
our share price declines.


OUR STOCK PRICE HAS BEEN HIGHLY VOLATILE AND IS LIKELY TO EXPERIENCE EXTREME
  PRICE AND VOLUME FLUCTUATIONS IN THE FUTURE THAT COULD REDUCE THE VALUE OF
  YOUR INVESTMENT, SUBJECT US TO LITIGATION, CAUSE US TO BE UNABLE TO MAINTAIN
  THE LISTING OF OUR COMMON STOCK ON THE NASDAQ NATIONAL MARKET, AND MAKE
  OBTAINING FUTURE EQUITY FINANCING MORE DIFFICULT FOR US

    The market price of our common stock has fluctuated in the past and is
likely to continue to be highly volatile, with extreme price and volume
fluctuations. The Nasdaq National Market, where most publicly held Internet
companies are traded, has experienced substantial price and volume fluctuations.
These broad market and industry factors may harm the market price of our common
stock, regardless of our actual operating performance, and for this or other
reasons we could continue to suffer significant declines in the market price of
our common stock.

    In the past, companies that have experienced volatility in the market price
of their stock have been the object of securities class action litigation. If we
were to become the object of securities class action litigation, it could result
in substantial costs and a diversion of our management's attention and
resources.


    Our common stock is currently listed on the Nasdaq National Market. We must
satisfy a number of requirements to maintain our listing on the Nasdaq National
Market, including maintaining a minimum bid price for our common stock of $1.00
per share. A company fails to satisfy this requirement if its closing bid price
remains below $1.00 per share for 30 consecutive business days.


                                       10


From time to time our common stock has had a closing bid price below $1.00 per
share. There can be no assurance that our bid price will comply with the
requirements of the Nasdaq National Market to facilitate continued listing of
our common stock on the Nasdaq National Market. If our common stock loses its
Nasdaq National Market status, it would most likely trade on the Nasdaq Over the
Counter Bulletin Board, which is viewed by most investors as a less desirable
and less liquid marketplace. This outcome would be likely to harm the trading
price of our common stock. In addition, continued listing on the Nasdaq National
Market or listing on the Nasdaq SmallCap Market, American Stock Exchange or New
York Stock Exchange is a condition to drawing down funds under the equity line
facility.



    In addition, declines in our stock price might harm our ability to issue, or
significantly increase the ownership dilution to stockholders caused by our
issuing, equity in financing or other transactions. The price at which we issue
shares in such transactions is generally based on the market price of our common
stock and a decline in our stock price would result in our needing to issue a
greater number of shares to raise a given amount of funding or acquire a given
dollar value of goods or services. A low stock price may impair our ability to
draw down funds under the equity line facility, because The Kingston Limited
Partnership, the purchaser under the equity line facility, absent a waiver of
the minimum purchase price requirements under the facility by the parties, is
generally not required to purchase shares of our common stock under the facility
on a given day if our volume-weighted average stock price during such day is
less than $1.60 per share or to the extent that such purchases would exceed
specified limitations based on our trading volume.


OUR STOCK PRICE COULD DECLINE AND OUR STOCKHOLDERS COULD EXPERIENCE SIGNIFICANT
  OWNERSHIP DILUTION DUE TO OUR ABILITY TO ISSUE SHARES UNDER THE EQUITY LINE
  FACILITY


    Under the equity line facility, we may sell, subject to various
restrictions, up to $7.5 million of common stock in each of up to 20 drawdown
periods of 22 trading days each over the course of a period of up to two years,
provided that we cannot sell more than $125 million in total under the facility
and may in practice only be able to sell a much lower amount. The total number
of shares that may be issued under the facility depends on a number of factors,
including the market price and trading volume of our common stock during each
drawdown period we choose to initiate. While we have no obligation to sell any
shares under the equity line facility, the facility may be terminated if we sell
no shares to Kingston for a period of four consecutive months.



    Because the purchase price of any shares we choose to sell under the equity
line facility is based on the average market price of the common stock on the
date of purchase, both the number of shares we would have to sell in order to
draw down any given amount of funding and the associated ownership dilution
experienced by our stockholders will be greater if the price of our common stock
declines. The lowest price at which Kingston is obligated to purchase shares
from us under the equity line facility is $1.50 per share. We and Kingston have
previously agreed to waive this condition with respect to one drawdown period
when the lowest price would have otherwise been $2.50 per share and we may agree
to waive this condition from time to time in the future in order to allow us to
sell shares to them at lower prices.



    In the event that we were able, in spite of the various restrictions
contained in the equity line facility, to draw down the maximum amount under the
facility, and if we indeed chose to draw down the full $125 million, and if all
sales under the facility occurred at $1.50 per share, then we would need to
issue 83,333,333 shares of common stock to Kingston, well in excess of the
41,134,350 shares of our common stock outstanding as of December 31, 2000. If
Kingston permitted us to sell shares to them at prices lower than $1.50 per
share and we chose to do so, then it is possible that an even greater number of
shares could be issued. In general, ownership dilution will increase as the
market price for our common stock declines.


                                       11


    As of January 23, 2001, we had registered 10,000,000 shares of our common
stock for sale with the Securities and Exchange Commission in connection with
the equity line facility. If issued, these shares would represent 19.56% of our
shares outstanding, when added to the number of shares outstanding as of
December 31, 2000.



    The perceived risk associated with the possible sale of a large number of
shares under the equity line facility--at prices as low as $1.50 per share in
the absence of a waiver from Kingston or at even lower prices to the extent such
waivers have been requested and granted--could cause some of our stockholders to
sell their stock, thus causing the price of our stock to decline. In addition,
actual or anticipated downward pressure on our stock price due to actual or
anticipated sales of stock under the equity line facility could cause some
institutions or individuals to engage in short sales of our common stock, which
may itself cause the price of our stock to decline.



WE MAY ISSUE COMMON STOCK TO PAY FOR SERVICES IN TRANSACTIONS THAT CAUSE
  DILUTION TO OUR STOCKHOLDERS, AND THE DILUTIVE EFFECT OF THESE ISSUANCES WOULD
  INCREASE TO THE EXTENT THAT OUR STOCK PRICE DECLINES



    In addition to the equity line facility, we have entered into a number of
relationships in which we expect to use our common stock to compensate third
parties for services performed for us, including subscriber referral services,
and we may enter into additional such relationships in the future. In most of
these transactions, the payments owed by Juno will be calculated in dollar
terms, with Juno having the right to issue an equivalent amount of its common
stock in lieu of making cash payments. We currently anticipate that we will
exercise those rights to make payments in our common stock where available to
us, although we may choose to pay for some or all of such expenses in cash. If
the price of Juno common stock should decline, our electing to pay with common
stock would entail issuing a relatively larger number of shares, increasing the
dilutive effect on our stockholders, and potentially impairing our ability to
draw down on the equity line facility or execute other financing transactions.
Additionally, the third parties to whom we issue common stock will generally
have registration rights that require us to register these shares of common
stock for resale in the public markets. The market price of our common stock
could decline as a result of sales of these shares in the market, or the
perception that such sales could occur.


FUTURE SALES OF OUR COMMON STOCK MAY NEGATIVELY AFFECT OUR STOCK PRICE


    In addition to potential future issuances of our common stock, we have a
large number of shares of common stock currently outstanding and available for
resale. The market price of our common stock could decline as a result of sales
of a large number of shares of our common stock in the market, or the perception
that such sales could occur. These sales also might make it more difficult for
us to sell equity securities in the future at a price that we think is
appropriate, or at all.



THE PROVISION OF FULL WEB ACCESS AS A FEATURE OF OUR BASIC SERVICE CREATES
  SUBSTANTIAL RISKS


    In December 1999, we expanded our free basic service to include full
Internet access, including access to the World Wide Web. We face numerous costs,
operational and legal risks, and other uncertainties associated with our
provision of free Web access to consumers, including the following:


    - RISK THAT OUR PAYING SUBSCRIBERS WILL CANCEL THEIR BILLABLE SERVICE
      SUBSCRIPTIONS AND SWITCH TO OUR FREE SERVICE. Since users of our basic
      service can access the Web for free, some Juno Web subscribers may cancel
      their billable service subscriptions and switch to the free basic service.
      If the number of Juno Web subscribers who switch to the free basic service
      is significant, our business and financial results may suffer.



    - RISK THAT THE NUMBER OF HOURS OUR FREE BASIC SERVICE IS USED, AND THE COST
      OF PROVIDING THE SERVICE, WILL NOT DECREASE, AND MAY INCREASE. The cost of
      providing our free basic service is


                                       12


      proportional to the amount of time subscribers to the service spend using
      it to connect to the Internet or to Juno's central computers. As users of
      the service spend more time connected, the costs we incur to provide the
      service go up. Starting toward the end of 2000, we began implementing
      measures designed to address disproportionate resource consumption by
      relatively heavy users of our free basic service, but there can be no
      assurance that these or any future measures we may implement will be
      successful in reducing either average connection time per subscriber or
      aggregate connection time for all users of the service. If aggregate hours
      of connection time associated with our free basic service do not decline,
      our business and financial results may suffer.



    - RISK THAT WE MAY BE UNABLE TO GENERATE SIGNIFICANT REVENUES FROM THE SALE
      OF ADVERTISING ON THE PERSISTENT ADVERTISING AND NAVIGATION BANNER
      CURRENTLY DISPLAYED WHILE FREE SUBSCRIBERS USE THE WEB, OR THAT PENDING
      LITIGATION MIGHT REQUIRE US TO PERMANENTLY DISABLE THIS BANNER OR
      DISCONTINUE ITS USE FOR THE DISPLAY OF THIRD-PARTY ADVERTISING. The
      display of a persistent advertising and navigation banner to users of our
      basic service when they use the Web creates a significant amount of
      advertising inventory. To date, this advertising inventory has not
      generated significant revenues, even with the efforts of a third party,
      24/7 Media, engaged by us to bear primary responsibility for the sale of
      this inventory in return for a commission. In late 2000, we settled an
      arbitration proceeding we initiated against 24/7 Media, and the parties
      agreed to a restructured, non-exclusive relationship without future
      guaranteed minimum payments to Juno.



          Additionally, in connection with a patent infringement action brought
      against us by NetZero, Inc., we have discontinued the display of
      third-party advertisements in the persistent advertising and navigation
      banner as of January 12, 2001, pursuant to a temporary injunction entered
      by the court. The injunction is expected to remain in effect through
      April 9, 2001, and may be extended thereafter. If NetZero ultimately
      succeeds in its infringement action, we may be permanently prohibited from
      utilizing our advertising and navigation banner for the display of
      third-party advertising or possibly for any purpose, including the
      promotion of Juno's own premium billable services and the differentiation
      of our free basic service from our premium billable services.



          There can be no assurance that, in the future, we will be able to
      continue the use of the advertising and navigation banner on our free
      basic service, or, that if we are permitted to do so, we will be able to
      generate significant revenues from the sale of advertising inventory on
      this banner, either through 24/7 Media, any other third-party sales agent,
      or our own internal sales organization. If we are unable to sell this
      inventory or to do so at favorable rates, our advertising revenues could
      suffer.



WE MAY EXPERIENCE CONTINUED INCREASES IN OUR TELECOMMUNICATIONS COSTS



    Our telecommunications costs represent one of the most significant expenses
of providing our services, and they may continue to increase, especially if
overall use of the Web by our subscribers increases. When using e-mail,
subscribers generally need to be connected to our central computers only for the
relatively short period of time required to send e-mail they have written or
download e-mail that has been sent to them. However, when using the Web, or when
using e-mail while connected to the Web, a subscriber remains continuously
connected to the Internet for the entire duration of the session. Since we
purchase telecommunications resources on a metered basis based on hours of
connection time, the longer connections associated with accessing the Web
generate significantly higher expenses than the shorter connections generally
associated with downloading or uploading e-mail messages. Starting toward the
end of 2000, we began implementing measures designed to reduce the amount of
time heavier users of our free basic service spend connected, but there is a
substantial risk that our efforts will not result in significant reductions in
the overall telecommunications resources


                                       13


consumed by users of our free basic service. Additionally, since some of our
telecommunications agreements include tiered pricing arrangements under the
terms of which our rates increase if usage declines below specified levels, even
a significant reduction in per-subscriber telecommunications consumption might
fail to result in proportional savings to Juno.



    Furthermore, we have experienced significant increases in the amount of time
that users of our billable premium services spend connected to the Web. We
believe this trend is likely to continue and may accelerate, potentially causing
overall connection time by Juno subscribers and/or connection time per Juno
subscriber to increase, even if we are successful at reducing connection time
per subscriber to the free basic service. Accordingly, this trend could be
expected to increase our telecommunications costs both on an absolute and a
per-subscriber basis, unless we are able to achieve corresponding reductions in
our telecommunications rates. If we were to attract new subscribers to our
services, our telecommunications costs would increase still further on an
absolute basis. We cannot assure you that we will be able to achieve adequate
reductions in our per-subscriber telecommunications costs, or any such
reductions, and if we are unable to achieve such reductions, our business and
financial results will suffer.


IF WE FAIL TO ADEQUATELY PROTECT OUR INTELLECTUAL PROPERTY OR FACE A CLAIM OF
  INTELLECTUAL PROPERTY INFRINGEMENT BY A THIRD PARTY, WE COULD LOSE OUR
  INTELLECTUAL PROPERTY RIGHTS OR BE LIABLE FOR SIGNIFICANT DAMAGES

    We have taken steps to protect our intellectual property rights, but we
cannot be certain that our efforts will be adequate to safeguard our rights to
technology we have developed. Disputes concerning the ownership or rights to use
intellectual property could be costly and time-consuming to litigate, may
distract management from other tasks of operating the business, and may result
in our loss of significant rights or possibly the loss of our ability to operate
our business entirely.


    On December 26, 2000, NetZero, Inc. filed an action in the United States
District Court for the Central District of California, alleging that Juno has
infringed U.S. Patent No. 6,157,946. NetZero has alleged that the persistent
advertising and navigation banner used on Juno's free service, along with other
elements of Juno's service, infringes the patent. NetZero is seeking unspecified
monetary damages, attorneys fees, and various forms of preliminary and permanent
injunctive relief, including a prohibition on Juno's continuing to offer its
free service in its current form. On January 5, 2001, the court granted an
interim temporary restraining order prohibiting Juno from displaying third-party
advertisements in the persistent advertising and navigation banner displayed to
users of Juno's free service. This order will remain in effect until April 9,
2001, at which time, we expect the court to hold a preliminary injunction
hearing to determine whether to extend, modify, or terminate the interim order.
The court has scheduled a trial commencing in July 2001. If, as a result of this
dispute, we were required permanently to discontinue our display of third-party
advertising on the advertising and navigation banner, our advertising revenues
could be materially harmed. If we were required permanently to discontinue our
use of the persistent advertising and navigation banner entirely, the presence
of this device as a differentiating feature between our free service and our
premium services, as well as our ability to use the banner to promote our
billable premium services, would be eliminated, and our ability to upgrade users
to and retain users in our billable premium services would be impaired. If we
were required to cease providing our free service in its current form, our
financial results and our business prospects could be materially adversely
affected. We intend to defend our interests vigorously in this matter.



    We have been granted five U.S. patents covering aspects of our technology
for the offline display of advertisements and the authentication and dynamic
scheduling of advertisements and other messages to be delivered to computer
users. We have also filed a number of other U.S. patent applications relating to
additional aspects of our business. We cannot assure you, however, that these
applications


                                       14


will result in the issuance of patents, that any patents that have been granted
or that might be granted in the future will provide us with any competitive
advantages or will be exploited profitably by us, or that any of these patents
will withstand any challenges by third parties. We also cannot assure you that
others will not obtain and assert patents against us which are essential for our
business. If patents are asserted against us, we cannot assure you that we will
be able to obtain license rights to those patents on reasonable terms or at all.
If we are unable to obtain licenses, we may be prevented from operating our
business and our financial results may therefore be harmed.


    Except as described above, we rely solely upon copyright and trademark law,
trade secret protection and confidentiality agreements with our employees and
with some third parties to protect our proprietary technology, processes, and
other intellectual property, to the extent that protection is sought or secured
at all. We cannot assure you that any steps we might take will be adequate to
protect against infringement and misappropriation of our intellectual property
by third parties. Similarly, we cannot assure you that third parties will not be
able to independently develop similar or superior technology, processes, or
other intellectual property. Furthermore, we cannot assure you that third
parties will not assert claims against us for infringement and misappropriation
of their intellectual property rights nor that others will not infringe or
misappropriate our intellectual property rights, for which we may wish to assert
claims.


OUR ABILITY TO CAUSE OUR FREE BASIC SERVICE SUBSCRIBERS TO UPGRADE TO OUR
  BILLABLE PREMIUM SERVICE IS UNCERTAIN. IF THE NUMBER OF SUBSCRIBERS UPGRADING
  TO OUR BILLABLE SERVICES FALLS SHORT OF OUR GOALS, OUR BUSINESS AND FINANCIAL
  RESULTS WILL SUFFER



    Our business strategy contemplates that some of the subscribers to our free
basic service will decide over time to upgrade to our premium services. We are
relying increasingly on this migration as a major source of subscribers to our
billable premium services. Since July 1998, we have conducted advertising to our
free basic service subscribers to encourage them to upgrade. There is a risk
that repeated exposure to these advertisements may cause their effectiveness to
decline. As a result, such advertisements may prove insufficient to generate
growth in or maintain the size of our billable subscriber base. We expect that
it will become more difficult and expensive over time to effectively market our
premium services to users of our free basic service. Accordingly, the rate at
which users of the free basic service upgrade to our billable premium services
may decline. If our marketing techniques fail to generate an adequate conversion
rate from free to billable premium services, if the acquisition cost for
subscribers acquired directly or indirectly into our billable premium services
is greater than expected, if diminished capital resources require us to curtail
even further our use of external marketing channels, or if technical limitations
make the conversion process more difficult or time-consuming than anticipated,
our business and financial results will suffer.


OUR MARKETING RESOURCES MAY BE INSUFFICIENT TO GENERATE NEW SUBSCRIBERS OR
  AWARENESS OF OUR SERVICES


    In light of our objective of preserving cash resources, we have
significantly reduced our marketing activities in recent quarters, and we may
reduce such activities further in the future. Any marketing activities we do
engage in may not be sufficient to increase or maintain either the size of our
subscriber base or awareness of our services. Many of our competitors have
greater financial resources than we do and have undertaken significant
advertising campaigns. We cannot predict the timing, the type, or the extent of
future advertising activities by our competitors. It is possible that marketing
campaigns undertaken by our competitors will have an adverse effect on our
ability to retain or acquire subscribers. If we incur costs in implementing
marketing campaigns without generating sufficient new subscribers to our
services, or if capital limitations or other factors prevent us from
implementing marketing campaigns, or if marketing campaigns undertaken by
competitors cause attrition in our subscriber base, our business and financial
results may suffer.


                                       15


OUR SUBSCRIBER COUNT MAY DECLINE AND OUR BUSINESS MAY SUFFER AS A RESULT OF
  CONTINUED REDUCTIONS IN OUR SUBSCRIBER ACQUISITION ACTIVITIES


    We may not succeed in acquiring or retaining a sufficiently large subscriber
base for our free basic service and our billable premium services. To acquire
new subscribers, we have historically relied on a number of cash-intensive
distribution channels for our free proprietary software that enables subscribers
to use our services. The most significant channel has been the use of direct
mail to circulate diskettes or CDs containing our software to large numbers of
prospective subscribers. We have suspended substantially all use of direct mail
for subscriber acquisition, and although our plans could change in response to
any of a number of factors, we do not currently expect to increase its use in
the near future. We have also reduced our use of other subscriber acquisition
channels, particularly channels that require significant cash expenditures, and
currently plan to reduce subscriber acquisition activities further in the
future. We have undertaken some alternative subscriber acquisition activities
that entail the expenditure of lesser amounts of cash, including stock-based
subscriber referral agreements with two former Internet access providers,
WorldSpy and Freewwweb, and with a retailer of computer software, Babbage's.
However, there can be no assurance that we will choose to pursue such
opportunities in the future, that we will be successful in identifying or
exploiting additional such opportunities if we do choose to pursue them, or that
the number of subscribers generated by any such opportunities we do identify and
exploit will be sufficient to grow, or even to maintain the size of, our
subscriber base. Additionally, there is a risk that recent declines in the
trading price of our common stock will adversely affect the willingness of
potential counterparties to accept Juno common stock as an alternative to cash
consideration in connection with such opportunities. To the extent that
alternative subscriber acquisition methods we employ involve the issuance of
Juno common stock as consideration, existing stockholders may experience
significant dilution of their ownership interest and the newly issued securities
may have rights superior to those of our common stock.

DIFFICULTY RETAINING SUBSCRIBERS TO OUR SERVICES, AS WELL AS SUBSCRIBER
  ATTRITION CAUSED BY MEASURES WE HAVE IMPLEMENTED TO DISCOURAGE
  DISPROPORTIONATE USAGE OF OUR FREE SERVICE BY OUR HEAVIEST USERS, MAY CAUSE
  OUR BUSINESS TO SUFFER


    Our business and financial results are dependent on, among other things, the
number of subscribers to our services. Among other things, our number of active
subscribers has a significant impact on the number of advertising impressions we
have available to sell, and on how many billable service subscribers we can
potentially acquire by soliciting users of our free service. Each month, a
significant number of subscribers to our billable premium services choose to
cancel the service. In addition, each month a significant number of subscribers
to our free basic service become inactive. It is easy for Internet users to
switch to competing providers, and we believe that intense competition has
caused, and may continue to cause, many of our subscribers to switch to other
services. In addition, new subscribers may decide to use our services only out
of curiosity regarding the Internet, or to take advantage of free or low-cost
introductory offers for our billable premium services, and may later discontinue
using our services.



    Furthermore, we have recently begun implementing certain measures designed
to encourage the heaviest users of our free service to alter their usage
patterns, upgrade to one of our billable services, or generate additional
revenues in some other way that might help us cover the higher costs they cause
us to incur. While the details of these measures may change over time, these
measures currently include, but may or may not be limited to, the display of
additional advertising to heavier users and the prioritization of access to our
free service according to usage levels, among other factors. Such prioritization
mechanisms currently make it more difficult for the heaviest users of our free
service to establish and maintain a Web connection through Juno's free service,
particularly during those hours when overall usage tends to be highest, than is
expected to be the case for free subscribers whose usage patterns are more
typical. As a result of these measures, we are likely to experience at least
some degree, and possibly a substantial amount, of incremental subscriber
attrition. We are unable to predict the amount of such attrition we might
experience overall, or the extent to which it might involve


                                       16


subscribers other than those heavier users to whom we currently expect to target
these measures. In the event such measures were to result in a significant
decrease in the size of Juno's subscriber base, and particularly to the extent
such attrition were to involve subscribers other than the targeted groups, such
measures could cause our business and financial results to suffer. Furthermore,
we may at some point in the future charge a fee for our basic service or cap the
amount a subscriber may use this service in a given period or increase the
amount we charge subscribers for our billable premium services. If we were to
implement such changes, we might lose a significant number of subscribers and
our business and financial results could suffer.


    In the past, we have experienced lengthy periods during which subscriber
attrition caused the total number of subscribers using our services in a given
month to remain relatively static despite our addition of a substantial number
of new users to our services. In recent quarters, we have significantly reduced
our levels of cash expenditure for subscriber acquisition and retention, and we
expect to further reduce our cash expenditures for such activities in the
future. Although the many factors affecting subscriber acquisition and retention
make it difficult to accurately predict the future size of our subscriber base,
such reductions may cause our active subscriber counts to decline. To the extent
that such spending reductions, other changes in our policies or operations,
competitive or other market conditions, or other factors were to result in a
significant decline in the net number of active subscribers to one or more of
our services, this could cause our business and financial results to suffer.

SOME USERS OF OUR FREE BASIC SERVICE MAY BE UNABLE TO ACCESS THE WEB


    In order to obtain access to the Web, users of our free basic service must
be equipped with a version of our software at least as recent as version 4.0, as
well as a recent version of Microsoft Internet Explorer, the Web browsing
software that our free basic service requires. At December 31, 2000,
approximately 10% of active users of our free basic service used versions of our
software older than version 4.0. Although we hope to upgrade such users'
software to a more recent version automatically by downloading the newer version
to their computer during one of their connections, technical constraints prevent
us from completing automatic upgrades for users of the oldest versions of our
software. Instead, these users must choose to install the current version of our
software and, in some cases, would need to be sent a copy of the software by
mail before they could complete this process. Approximately 3% of our free basic
service users currently use a version of the Microsoft Windows operating system
older than Windows 95, and cannot upgrade to a current version of the Juno
software unless they upgrade to a more current version of Windows. There is a
risk that some portion of our basic service user base will never upgrade to a
current version of the Juno software and will be unable to access the Web
through our free basic service.


    If a significant percentage of our basic service users do not use the Web,
our ability to display Web-related advertisements and generate associated
revenues will be harmed.

COMPETITION IN THE MARKETS FOR INTERNET SERVICES, INTERNET ADVERTISING AND
  ELECTRONIC COMMERCE IS LIKELY TO INCREASE IN THE FUTURE AND MAY HARM OUR
  BUSINESS

    The market for Internet services is extremely competitive and includes a
number of substantial participants, including America Online, Microsoft and
AT&T. The markets for Internet-based advertising and electronic commerce are
also very competitive. Our ability to compete depends upon many factors, many of
which are outside of our control.

    INTENSE COMPETITION EXISTS IN THE MARKET FOR INTERNET SERVICES


    We may not be able to compete successfully against current or future
competitors, and the competitive pressures that we face may cause our business
and financial results to suffer. We believe that the primary competitive factors
determining success in these markets include effective marketing to promote
brand awareness, a reputation for reliability and service, effective customer
support, pricing, easy-to-use software and geographic coverage. Other important
factors include the timing and introduction of new products and services as well
as industry and general economic trends. The market


                                       17


for Internet services has begun to consolidate, and we expect competition to
increase as some of our competitors grow larger through consolidation or begin
to bundle Internet services with other products and services. Our current and
potential competitors include many large national companies that have
substantially greater market presence and financial, technical, distribution,
marketing and other resources than we have. This may allow them to devote
greater resources than we can to subscriber acquisition activities and to the
development, promotion and distribution and sale of products and services.



    Our competitors may be able to charge less for premium Internet services
than we do for our billable premium services, or offer services for free that we
currently provide only for a fee, which may put pressure on us to reduce or
eliminate, or prevent us from raising, the fees we charge for our billable
premium services. We may choose, for competitive or other reasons, to lower or
eliminate the fees we currently charge for our billable premium services, or
enhance the features available to users of our free basic service, in order to
remain competitive with other industry participants. Any decrease in such prices
could result in a reduction in our billable services revenue and would harm the
profitability of our billable services.



    In the near term, however, we will increase the prices we charge at least
some subscribers to our billable premium services, in an effort to increase our
billable services revenue and profitability. Such price increase can be expected
to result in subscriber attrition, possibly to an extent sufficient to cause
overall revenues from billable services to decline, and these outcomes could
cause our business and financial results to suffer.



    In recruiting subscribers for our services, we currently compete, or expect
to compete, with the following types of companies, among others:



    - National providers of Internet access such as AOL Time Warner, EarthLink
      and Microsoft, including some companies, such as Bluelight.com and
      NetZero, that offer some level of Internet access for free;



    - Numerous independent regional and local Internet service providers that
      may offer lower prices than most national Internet service providers;



    - Various national and local telephone companies such as AT&T, MCI WorldCom
      Communications and Pacific Bell, a division of SBC Telecom;


    - Companies providing Internet access through "set-top boxes" connected to a
      user's television, such as WebTV, or through a "cable modem" connected to
      a user's personal computer, such as Excite@Home; and

    - Companies providing Internet access services using other broadband
      technologies, including digital subscriber line technology, commonly known
      as DSL, such as the Regional Bell Operating Companies and various partners
      of Covad, Rhythms, and NorthPoint.

    In addition, Microsoft and Netscape, publishers of the Web browsers utilized
by most Internet users, including Juno subscribers, each own or are owned by
online or Internet service providers that compete with Juno.

    In addition to competition from the types of companies listed above, we also
face the risk that subscribers to our premium billable services will migrate to
our free basic service, which would result in a decrease in our subscription
revenues.

    We do not currently offer services internationally, other than to a small
base of users located in Canada. If the ability to provide Internet services
internationally becomes a competitive advantage in our markets and we do not
begin to provide services internationally, we will be at a competitive
disadvantage.

                                       18

    WE RELY ON REVENUES FROM ADVERTISING AND ELECTRONIC COMMERCE AND THESE
     REVENUES HAVE BEEN, AND MAY CONTINUE TO BE, ADVERSELY AFFECTED BY CONTINUED
     WEAKNESS IN THE MARKET FOR INTERNET ADVERTISING.


    With respect to the generation of advertising and electronic commerce
revenue, we compete with many of the market participants listed above as well as
with various advertising-supported Web sites, including portal sites such as
Yahoo! and Lycos, content sites such as CNET and CNN.com, and interactive
advertising networks and agencies such as DoubleClick and 24/7 Media. We also
compete with traditional media such as print and television for a share of
advertisers' total advertising budgets. If advertisers perceive the Internet to
be a limited or ineffective advertising medium or perceive us to be less
effective or less desirable than other Internet advertising vehicles,
advertisers may be reluctant to advertise on our services.



    In addition to intense competition, the overall market for Internet
advertising has been characterized in recent quarters by continuing and
significant reduction in demand, the reduction or cancellation of advertising
contracts, a significant increase in uncollectible receivables from advertisers,
and a significant reduction of Internet advertising budgets, especially by
Internet-related companies. In addition, an increasing number of
Internet-related companies have experienced deteriorating financial results and
liquidity positions, and/or ceased operations or filed for bankruptcy
protection, or may be expected to do so. The impact of these trends is
exacerbated in Juno's case because of the large percentage of Juno's advertisers
that are Internet related companies. If demand for Internet advertising in
general or our advertising inventory in particular does not increase or declines
further, if our advertisers reduce or cancel their contracts with us or if we
are unable to collect amounts they owe us for contracts we fulfill, our business
and financial results may suffer.


    OUR COMPETITION IS LIKELY TO INCREASE IN THE FUTURE


    Our competition has increased and is likely to continue to increase. We
believe this will probably happen as Internet service providers and online
service providers consolidate and become larger, more competitive companies, and
as large diversified telecommunications and media companies acquire Internet
service providers. Many market participants offer services similar to one or
more of the services we provide. Other market participants may introduce free or
billable Internet services that compete with ours. The larger Internet service
providers and online service providers, including America Online, offer their
subscribers a number of services that we do not currently provide. Some
diversified telecommunications and media companies, such as AT&T, have begun to
bundle other services and products with Internet access services, potentially
placing us at a significant competitive disadvantage. Additionally, some
Internet service providers and personal computer manufacturers have formed
strategic alliances to offer free or deeply discounted computers to consumers
who agree to sign up with the service provider for a one-year or multi-year
term. In a variant on this approach, some Internet service providers have
secured strategic relationships with manufacturers or retailers of computer
equipment in which the service provider finances a rebate to consumers who sign
up with the service provider for one or more years. In the past, we have formed
several such relationships, and did not find them effective as a means of
attracting new subscribers to our services. Our competitors may be able to
establish strategic alliances or form joint ventures that put us at a serious
competitive disadvantage. Increasing competition could result in increased
subscriber attrition. It could also put pressure on us to increase our spending
for sales and marketing and for subscriber acquisition and retention activities
at a time when we may not have adequate cash resources to devote to such
activities. Competition could also require us to lower the prices we charge for
our billable premium services, or eliminate such fees altogether, in order to
maintain our marketplace position, or, alternatively, could cause our
marketplace position to suffer if, as we currently believe is more likely, we
were to increase the prices we charge at least some subscribers to our billable
services. Any of these scenarios could harm our business and financial results,
and we may not have the resources to continue to compete successfully.


                                       19

OUR STRATEGIC MARKETING ALLIANCES AND OTHER SOURCES OF ADVERTISING REVENUE ARE
  CONCENTRATED IN THE INTERNET INDUSTRY, MAKING US VULNERABLE TO DOWNTURNS
  EXPERIENCED BY OTHER INTERNET COMPANIES OR THE INTERNET INDUSTRY IN GENERAL


    In the quarter ended December 31, 2000, we derived approximately 70% of our
advertising revenue from strategic marketing and advertising relationships with
other Internet companies. At the current time, we believe that some of these
companies may be having difficulty generating operating cash flow or raising
capital, or are anticipating such difficulties, and are electing to scale back
the resources they devote to advertising, including on our services. Other
companies in the Internet industry have depleted their available capital, and
have ceased operations or filed for bankruptcy protection or may be expected to
do so. Difficulties such as these may affect the total amount of advertising
inventory we can sell, and may continue to affect our ability to collect
revenues or advances against revenues from our existing partners or advertisers
as such amounts become due. An increasing number of our strategic marketing
partners and advertisers, including some with agreements providing for minimum
guaranteed payments, have either already defaulted on periodic payments due to
us, or informed us that they will not meet their obligations. If the current
environment for Internet advertising does not improve, our business and
financial results may suffer.



    In September 1999, Juno entered into an agreement with News America Digital
Publishing, an affiliate of News Corporation, under which Juno received revenues
for displaying Fox-branded news, sports, entertainment and business content on
the Juno Web site. This agreement has been terminated by News America Digital
Publishing, effective February 15, 2001.



WE ARE DEPENDENT ON STRATEGIC MARKETING ALLIANCES AS A SOURCE OF REVENUES AND
  OUR BUSINESS COULD SUFFER IF ANY OF THESE ALLIANCES IS TERMINATED



    We have strategic marketing alliances with a number of third parties, and
most of our strategic marketing partners have the right to terminate their
agreements with us on short notice. The number of terminations of various types
of advertising contracts by our partners increased over the course of 2000. In
light of the concentration of our advertisers within the Internet industry, we
expect that this trend will continue in 2001, which could cause our business and
financial results to suffer, especially if such terminations are coupled with a
refusal to pay amounts owed to Juno at the time of termination. If any of our
strategic marketing agreements are terminated, we cannot assure you that we will
be able to replace the terminated agreements with equally beneficial
arrangements. We also expect that we will not be able to renew all of our
current agreements when they expire and that, to the extent we are able to renew
some or all, that we may not be able to do so on acceptable terms. We also do
not know whether we will be successful in entering into additional strategic
marketing alliances, or that any additional relationships, if entered into, will
be on terms favorable to us. Our receipt of revenues from our strategic
marketing alliances may also be dependent on factors which are beyond our
control, such as the quality of the products or services offered by our
strategic marketing partners.


OUR BUSINESS MAY BE ADVERSELY AFFECTED IF THE MARKET FOR INTERNET ADVERTISING
  CONTINUES TO CONTRACT OR FAILS TO RECOVER

    Our business and financial results are dependent on the use of the Internet
as an advertising medium. Internet-based advertising accounts for only a small
fraction of all advertising expenditures, and we cannot be sure that
Internet-based advertising will ever grow to account for a substantial
percentage of total advertising spending or when an increase might occur. Our
business may suffer if the market for Internet-based advertising continues to
contract or fails to recover. Our business also may suffer if users install
"filter" software programs that limit or prevent advertising from being
delivered to their computers. Widespread adoption of this type of software could
harm the commercial viability of Internet-based advertising.


    Sales of advertising space on our services represent an important revenue
source for us. Competition for Internet-based advertising revenues is intense,
and this competition, together with an increase in the amount of advertising
space available overall on the Internet, has resulted in significant


                                       20


price erosion over time, which may continue. We cannot assure you that we will
be successful in selling advertising or capturing a significant share of the
market for Internet-based advertising. We also cannot assure you that we will be
able to sell advertising at the rates we currently project, and it may become
necessary to lower the rates for advertising space on our services.



    We currently rely primarily on our internal sales and marketing personnel
for generating sales leads and promoting our services to the advertising
community. We also rely on third-party relationships in which Juno receives
revenue in return for displaying advertising sold by a third party or in which
Juno is compensated for delivering viewers to Web pages on which ads sold by a
third party are displayed. These arrangements include a relationship with
LookSmart Ltd., under the terms of which LookSmart provides Internet search and
directory features to our subscribers through our Web portal site, and we are
entitled to receive payments based on the volume of Web pages viewed by users of
these features. We cannot be sure that our users will find the services provided
by LookSmart useful, or that they will utilize LookSmart's search and directory
features in a manner that generates significant revenue to Juno, or that our
relationship with LookSmart will continue in its current form or at all. If use
of the LookSmart features is less than projected or if Juno's relationship with
LookSmart is either terminated or modified in ways that are unfavorable to us,
our business and financial results may suffer. In recent quarters, we have
experienced difficulties in achieving our projected level of advertising sales.
If our internal sales organization or any third-party sales agents we might rely
on are not able to accomplish our sales objectives, then our business and
financial results may suffer.



    Additionally, as of January 12, 2001, in connection with a patent
infringement action brought against us by NetZero, Inc., we have, pursuant to a
temporary order entered by the court, discontinued the display of third-party
advertisements in the persistent advertising and navigation banner displayed to
users of our free basic service when they use the Web. The order will remain in
effect through April 9, 2001, and possibly thereafter. If NetZero ultimately
succeeds in its infringement action, we may be permanently prohibited from
utilizing our advertising and navigation banner as an additional source of
advertising inventory. There can be no assurance that, in the future, we will be
able to continue the use of the advertising and navigation banner in any
fashion, or that, if we are permitted to do so, we will be able to generate
significant revenues from the sale of advertising inventory on this banner,
either through a third-party sales agent or our own internal sales organization.
If we are unable to sell this inventory or to do so at favorable rates, our
advertising revenues could be materially adversely affected. Furthermore, if
Internet-based advertising continues to contract or fails to recover or if we
are unable to capture a sufficient share of Internet-based advertising, our
business and financial results may suffer.


IF INTERNET USAGE DOES NOT CONTINUE TO GROW, OUR BUSINESS WILL SUFFER

    Our business and financial results depend on continued growth in the use of
the Internet. We cannot be certain that this growth will continue or that it
will continue in its present form. If Internet usage declines or evolves away
from our business, our ability to grow, if any, will be harmed.

WE MUST ADAPT TO TECHNOLOGY TRENDS AND EVOLVING INDUSTRY STANDARDS OR WE WILL
  NOT BE COMPETITIVE

    Our failure to respond in a timely and effective manner to new and evolving
technologies, including cable modem and other broadband technology, could harm
our business and financial results. The Internet services market is
characterized by rapidly changing technology, evolving industry standards,
changes in member needs and frequent new service and product introductions. We
may not be able to foresee or respond to these technical advances effectively or
at all. Our business and financial results depend, in part, on our ability to
use leading technologies effectively, to develop our technical expertise, to
enhance our existing services and to develop new services that meet changing
member needs on a timely and cost-effective basis. In particular, we must
provide subscribers with the appropriate products, services and guidance
required to best take advantage of the rapidly evolving Internet. If the market
for our services should fail to develop, develop more slowly than we expect,

                                       21

become saturated with competitors, or develop in a fashion that renders our
services uncompetitive or otherwise unappealing to consumers, our business and
financial results may suffer.


    We are also at risk due to fundamental changes in the way that Internet
access may be provided in the future. Currently, consumers access Internet
services primarily through computers connected by telephone lines. Broadband
connections, however, allow significantly faster access to the Internet than is
possible using the telephone-based analog modems currently used by most of our
subscribers. In many regions, cable television companies, local and long
distance telephone companies, and wireless communications companies, have begun
to provide Internet access. These competitors may include Internet access in
their basic bundle of services or may offer Internet access for a nominal
additional charge. We have begun to enter into arrangements with providers of
broadband connections to allow the delivery of our services over distribution
channels they own or control. However, the majority of our broadband
relationships are at a developmental, trial, or initial implementation stage and
the associated services are used by a negligible number of subscribers at the
current time. Moreover, only a portion of our subscriber base is currently
served by broadband providers with which we have existing agreements. In other
segments of our market, there is a risk that we may be unable to offer our
subscribers high-speed Internet access. In the future, we might also be
prevented from delivering high-speed Internet access through networks controlled
by competitors of ours, or from doing so on a cost-effective basis.


    Even if we are not prevented from delivering our Internet services through
the broadband connections owned by other companies, the delivery of our Internet
services using broadband technology is subject to significant risks and
uncertainties, and we may be unable to adapt to the challenges posed by
broadband technologies.

    We may also have to modify the means by which we deliver our Internet
services, in which case we would incur significant costs. If consumers adopt
alternative forms of Internet access that provide a continuous connection to the
Internet rather than relying on a series of separate dial-up connections, then
any competitive advantage that we currently realize because our technology
minimizes connect time may diminish. If other companies are able to prevent us
from delivering our Internet services through the wire, cable and wireless
connections that they own, if we are unable to adapt to the challenges posed by
broadband technologies or if we incur significant costs without generating
sufficient revenues, our business and financial results may suffer.


AS THE MARKET FOR BROADBAND SERVICES EXPANDS, OUR BUSINESS MAY BE HARMED IF WE
  CANNOT PROVIDE COMPETITIVE BROADBAND SERVICES



    Juno Express, our billable broadband service, delivers Internet access at
broadband speeds, currently through the use of DSL and mobile wireless
technologies. Juno Express currently accounts for an extremely small percentage
of our active subscriber base and may never account for a material percentage.
If broadband services increase in popularity and we are not successful at
rolling out or expanding our broadband services, our business and financial
results may suffer.



    To date, we have found Juno Express to be a costly service to market and to
operate, due in part to factors such as unfamiliarity on the part of consumers,
unavailability to large portions of our subscriber base, installation
difficulties, relatively high retail price points, and high operating costs,
among others. There can be no assurance that we will be successful in addressing
any of these issues.



    Consumers who wish to subscribe to the DSL version of Juno Express currently
must go through a complex installation process, for which we are dependent on
the performance of the local telephone company. We are also currently dependent
on the performance of a national supplier of DSL services, Covad Communications,
with whom we have chosen to partner for the delivery of Juno Express using DSL
technology. If our relationship with Covad is unsuccessful or is terminated, if
Juno and Covad are unable to coordinate effectively with local telephone
companies, if difficulties associated with the installation process cause
subscribers to cancel their DSL orders, or if other factors delay or otherwise
hinder our ability to expand beyond the markets in which the service is
currently available or prevent


                                       22


us from continuing to offer service in our current markets, or if these or other
factors affect our ability to deliver DSL-based services in a timely and
cost-effective fashion, then our business and financial results may suffer.



    In addition to the DSL service described above, we currently offer a Juno
Express mobile wireless service powered by Metricom's Ricochet technology. This
service is currently being offered in only 14 markets, and there can be no
assurances that the performance or availability of this service will be
acceptable to us or to our subscribers, that Metricom will be able to continue
providing this service in its current markets or expand the service into
additional markets, or that Metricom will have the capital resources to continue
operating the Ricochet service at all beyond the middle of 2001. Use of this
service requires subscribers to purchase and install special hardware, in
connection with which we are dependent on a third party that must coordinate
installation and activation with Metricom. If Metricom discontinues offering the
Ricochet service, it is unlikely that Juno could provide a substitute mobile
wireless service to its subscribers.



    Although we have begun to make arrangements for the provision of the Juno
Express service over other broadband platforms, the relationships on which such
expansion depends are new and are subject to significant risks and
uncertainties. We have entered into preliminary agreements with AT&T Broadband,
Comcast, and Time Warner Cable to test the provision of Internet services over
their cable systems, initially in small-scale, single-city trials. In the case
of AT&T Broadband and Comcast, there is a significant risk that our partners
will not succeed in renegotiating existing agreements under which Excite@Home
has the exclusive right to provide high-speed broadband services over these
partners' cable systems through June 2002. If they are unsuccessful, we will not
be able to offer Juno Express over their cable systems at speeds above 128kbps
until July 2002 at the earliest. Additionally, we may find that offering Juno
Express over cable systems requires us to incur levels of operating expense that
make broad expansion of these relationships unfeasible or unattractive to us.
Conversely, if we enter into agreements with these or other partners that
require us to undertake such broad expansion, the cost of performing our
obligations under such agreements might prove prohibitive. We may find that we
are unsuccessful in attracting a significant number of subscribers through these
relationships, especially in light of competitive services that are expected to
be offered through the same platforms. There are also risks that either of these
companies could exercise rights to terminate their relationship with Juno or
simply choose not to expand such relationships beyond the initial test stage.



    We have entered into an arrangement that allows us to offer Juno Express
through broadband satellite services provided by Hughes, but we do not currently
expect to offer this service in the foreseeable future. There are significant
risks and uncertainties associated with this arrangement, including risks that
additional technical development may be required, that the service may prove
unattractive to our customers, and that the pricing of the service may not be
competitive with other broadband services.


                                       23


    The market for broadband services is in the early stages of development, and
we cannot assure you that broadband services in general, or that any of DSL,
cable, mobile wireless or satellite technologies in particular, will become
popular with consumers. We cannot assure you that we will have adequate access
to any of these technologies at favorable rates, that we will be able to reach a
sufficient number of users through the broadband partners identified above, or
that we will have adequate capital to take advantage of existing or future
opportunities to provide broadband services. Juno Express faces competition in
the market for broadband services from many competitors with significant
financial resources, well-established brand names, and large existing customer
bases. In many markets, these competitors already offer, or are expected to
offer, broadband Internet access at prices lower than we expect to be able to
offer to potential customers for Juno Express. If we are unable to provide
competitive broadband services at competitive rates, our business and financial
results may suffer.


OUR ADVERTISING SYSTEM REQUIRES LABOR AND IMPOSES COSTS ON US BEYOND THOSE
  ASSOCIATED WITH STANDARD WEB ADVERTISING


    A significant fraction of the advertising inventory available on our
services is non-standard when compared to advertising on the Web, which may put
Juno at a competitive disadvantage. Although our Web portal site and the
persistent advertising and navigation banner shown to users of our free basic
service when they access the Web can utilize standard Web formatting, the
substantial amount of advertising inventory associated with the e-mail portion
of our services employs non-standard formatting. The advertisements displayed
while a subscriber reads and writes e-mail are created using proprietary tools
that are not fully compatible with standard Web advertising. Therefore, many
advertisements displayed on our services require customization that would not be
required by a Web site capable of displaying previously prepared standard
advertisements. This customization work increases the time necessary to prepare
an advertisement to be displayed on our services and the costs associated with
running these ads. We must also absorb the telecommunications cost associated
with downloading ads to our subscribers, which is an expense that
advertising-supported Web sites do not incur. As ads become more complex, our
telecommunications expenses may increase. Furthermore, the costs associated with
selling or attempting to sell advertising space on our services are significant.
These costs may be greater than the costs associated with selling advertising
space on Web sites that exclusively utilize standard Web advertising formats.
Additionally, our use of a proprietary advertising format on the e-mail portion
of our services could interfere with our packaging this advertising space for
sale by an advertising network such as DoubleClick or 24/7 Media. Any of the
above factors could discourage advertising on our network by some advertisers.


SEASONAL TRENDS IN INTERNET USAGE AND ADVERTISING SALES MAY NEGATIVELY AFFECT
  OUR BUSINESS


    Seasonal trends are likely to affect our business. Subscribers typically use
our Internet services less during the summer months and year-end holiday
periods. Under most of our advertising and strategic marketing relationships,
our advertising revenue is dependent on the number of impressions displayed to
our users. To the extent that usage by our subscribers is lower seasonally, our
revenues may be lower during these periods. In addition, the rate at which new
subscribers sign up for our billable premium services may be lower during the
summer months and year-end holiday periods, other things being equal.


    Since our operating expenses are based on our expectations of future
revenues, including seasonal fluctuations, it is possible that operating results
will suffer if these seasonal trends do not continue in the future or if
different seasonal trends develop in the future.

                                       24

WE ARE DEPENDENT ON A SMALL NUMBER OF TELECOMMUNICATIONS CARRIERS AND MAY BE
  UNABLE TO FIND ADEQUATE REPLACEMENTS IF THEIR RATES INCREASE, SERVICE QUALITY
  DECLINES, OR IF THEY DISCONTINUE DOING BUSINESS WITH US


    Our business and financial results depend in significant part on the
capacity, affordability, reliability and security of our telephone company data
networks. To use our services, subscribers must initiate telephone connections
between their personal computers and computer hardware in local or regional
facilities known as "points of presence." We contract for the use of points of
presence around the country from various telecommunications carriers. These
carriers currently include UUNET Technologies, which is operated by MCI WorldCom
Communications; Level 3 Communications; XO Communications (formerly Concentric);
Splitrock Services; Sprint Communications Company; PSINet; NaviPath and StarNet.
We also rely on these telecommunications companies to carry data between their
points of presence and our central computers located in Cambridge, Massachusetts
and Jersey City, New Jersey.



    As of February 28, 2001, we had contracted for the use of more than 4,000
local telephone numbers associated with points of presence throughout the United
States. Nevertheless, a minority of our subscriber base may be unable to access
our services through a point of presence that is within their local calling
area. These users may be particularly reluctant to use the Web, either through
our free basic service or through Juno Web, due to the telecommunications
charges that they would incur during an extended connection to the Web. The
inability of some of our subscribers to access the Web with a local call in some
areas of the country could harm our business. We cannot be sure if or when
additional infrastructure developments by our telecommunications providers will
establish points of presence that cover these areas.


    At various times in the past, network capacity constraints at particular
points of presence have prevented or delayed access by subscribers attempting to
connect to our services. This could happen in the future, especially during
times of peak usage. Difficulties accessing our services due to poor network
performance could cause our subscribers to terminate their subscriptions with
us. Because we depend on third-party telecommunications carriers for crucial
portions of our network infrastructure, we do not have direct control over
network reliability and some aspects of service quality. A natural disaster or
other unanticipated problem that affects the points of presence or the
telecommunications lines we use, or that affects the nation's telecommunications
network in general, could cause interruptions in our services.


    Only a small number of telecommunications companies can provide the network
services we require. This number has been reduced through consolidation in the
telecommunications industry, and there is a significant risk that further
consolidation could make us reliant on an even smaller number of providers. We
are particularly dependent on WorldCom, which, as of February 28, 2001, provided
more than 1,000 of the more than 4,000 points of presence for which we contract,
many of which are in locations not served competitively by other
telecommunications carriers. Our business could be significantly harmed if we
are unable to maintain a favorable relationship with WorldCom and the companies
they control. We cannot assure you that we would be able to replace all of the
services provided to us through WorldCom were our relationship with them to be
terminated.



    Our financial results are highly sensitive to variations in prices for the
telecommunications services described above. In the past, we have benefited from
reductions in per-unit pricing for telecommunications services. We cannot assure
you that telecommunications prices will continue to decline, or that there will
not be telecommunications price increases due to factors within or beyond our
control, including but not limited to consolidation in the telecommunications
industry, and a decline in the total number of telecommunications hours our
subscribers consume, possibly due in part to reductions in the size of our
subscriber base or the amount of telecommunications-related resources we allow
subscribers to use. We cannot assure you that our telecommunications carriers
will continue to


                                       25


provide us access to their points of presence on our current or better price
terms, that the price terms that they do offer us, if any, will be sufficiently
low to meet our needs, or that alternative services will be available in the
event that their quality of service declines or that our relationship with
WorldCom or any of our other current carriers is terminated. Additionally, the
number of telecommunications companies providing service to us may be reduced as
a result of one or more of these companies discontinuing dial-up service or
ceasing operations entirely. If any of these companies becomes unable to provide
service in locations not served by numerous other providers, the rates we pay
for telecommunications services may increase as a result of reduced competition.


    Most of the telecommunications services we purchase are provided to us under
short-term agreements that the providers can terminate or elect not to renew. As
a result, there is a significant risk that any or all of our telecommunications
carriers could end their relationship with us. In addition, each of our
telecommunications carriers provides network access to some of our competitors,
and could choose to grant those competitors preferential network access,
potentially limiting our members' ability to access the Internet or connect to
our central computers. Furthermore, the majority of our telecommunications
providers compete, or have announced an intention to compete, with us in the
market to provide consumer Internet access. If our telecommunications service
providers were to decrease the levels of service or access provided to us, or if
they were to terminate their relationships with us for competitive or other
reasons, our business and financial results would suffer.

WE ARE DEPENDENT ON A THIRD PARTY FOR TECHNICAL AND CUSTOMER SERVICE SUPPORT AND
  OUR BUSINESS MAY SUFFER IF IT IS UNABLE TO PROVIDE THESE SERVICES, CANNOT
  EXPAND TO MEET OUR NEEDS, OR TERMINATES ITS RELATIONSHIP WITH US

    Our business and financial results depend, in part, on the availability and
quality of live technical and customer service support services. Although many
Internet service providers have developed internal customer service operations
designed to meet these needs, we have elected to outsource these functions. We
currently purchase almost all of our technical and customer service support from
ClientLogic Corporation. As a result, we maintain only a small number of
internal customer service personnel. We are not equipped to provide the
necessary range of customer service functions in the event that ClientLogic
becomes unable or unwilling to offer these services to us.

    At December 31, 2000, ClientLogic provided approximately 550 full-time or
part-time employees at its facilities to service our account. We believe the
availability of call-in technical support and customer service is especially
important to acquire and retain subscribers to our billable premium services,
and we are dependent on ClientLogic to provide this function. At times, our
subscribers have experienced lengthy waiting periods to reach representatives
trained to provide the technical or customer support they require. We believe
that failure to provide consistent customer support and to maintain consumer-
acceptable hold times could have an adverse effect on our subscriber acquisition
and retention efforts in the future. However, maintaining desired customer
support levels may require significantly more support personnel than are
currently available to us through ClientLogic, or significantly greater expense
than we feel it is appropriate, or than we are able, to incur. Additionally, if
we elect to offer customer service features that we do not currently support, or
to enhance the overall quality of our customer support for competitive reasons,
we may require even greater resources. We are currently soliciting proposals
from additional vendors to supplement the services provided to us by
ClientLogic, or to provide such services in the event our relationship with
ClientLogic terminates. Our current agreement with ClientLogic converted to a
month-to-month contract on August 1, 2000, under which either party has the
right to terminate the relationship at any time upon one month's notice.
Although we are currently renegotiating the terms of our relationship with
ClientLogic, there is a significant risk that ClientLogic could exercise its
one-month termination rights under the current agreement if the parties are
unable to reach mutually acceptable terms. If our relationship with ClientLogic
terminates and we are unable to enter into a comparable arrangement with a
replacement vendor, if ClientLogic is

                                       26

unable to provide enough personnel to provide the quality and quantity of
service we desire, if system failures, outages or other technical problems make
it difficult for our subscribers to reach customer service representatives at
ClientLogic, or if we are unable to obtain externally or develop internally the
additional customer service and technical support capacity we expect to need,
our business and financial results may suffer.

DISRUPTION OF OUR INTERNET SERVICES DUE TO SECURITY BREACHES AND SYSTEM FAILURES
  COULD RESULT IN SUBSCRIBER CANCELLATIONS

    Both our infrastructure and the infrastructure of our network providers are
vulnerable to security breaches or similar disruptive problems and system
failures. Our systems are also subject to telecommunications failures, power
loss, software-related system failures and various other events. Any of these
events, whether intentional or accidental, could lead to interruptions, delays
or cessation of service to our subscribers. This could cause some of our
subscribers to stop using our Internet services. Third parties could also
potentially jeopardize the security of confidential information stored in our
computer systems or our subscribers' computer systems through their
inappropriate use of the Internet, which could cause losses to us or our
subscribers or deter some people from subscribing to our services. People may be
able to circumvent our security measures or the security measures of our third
party network providers.

    We may have to interrupt, delay or cease service to our subscribers to
alleviate problems caused by computer viruses, security breaches or other
failures of network security. Any damage or failure that interrupts or delays
our operations could result in subscriber cancellations, could harm our
reputation, and could affect our business and financial results. Our insurance
coverage may not adequately compensate us for any losses that may occur due to
any failures in our systems or interruptions in our services.

STAFF ATTRITION COULD STRAIN OUR MANAGERIAL, OPERATIONAL, FINANCIAL AND OTHER
  RESOURCES


    We had 65 employees at December 31, 1996; 152 employees at December 31,
1997; 144 employees at December 31, 1998; 263 employees at December 31, 1999,
including 60 employees in India; and 332 employees at December 31, 2000,
including 72 employees in India. Prior to May 21, 1999, consultants used in
India were employed by an affiliate of Juno. We expect to continue to rely on
outsourcing arrangements for our customer service needs and for the performance
of some advertising sales functions.



    Any staff attrition we experience, whether initiated by the departing
employees or by the company, could place a significant strain on our managerial,
operational, financial and other resources. To the extent that the company does
not initiate or seek any staff attrition that occurs, there can be no assurance
that we will be able to identify and hire adequate replacement staff promptly,
or at all. In January 2001, in addition to conducting some performance-related
terminations, we eliminated a small number of positions at Juno in response to
changes in our business needs, such as the significant reduction in our
marketing activities. We expect to evaluate our needs and the performance of our
staff on a periodic basis, and may choose to make further adjustments in the
future. If the size of our staff is significantly reduced, either by the
company's choice or otherwise, we could face significant management,
operational, financial and other constraints. For example, it may become more
difficult for us to manage existing, or establish new, relationships with
advertisers, vendors and other counterparties, or to expand and improve our
service offerings. It may become more difficult for us to implement changes to
our business plan or to respond promptly to opportunities in the marketplace. It
may become more difficult for us to devote personnel resources necessary to
maintain or improve existing systems, including our financial and managerial
controls, billing systems, reporting systems and procedures. Thus, any
significant amount of staff attrition could cause our business and financial
results to suffer.


                                       27


OUR JUNO VIRTUAL SUPERCOMPUTING PROJECT IS UNPROVEN AND MAY FAIL TO GENERATE
  REVENUES OR CONSUMER ACCEPTANCE



    In February 2001, we announced the Juno Virtual Supercomputer Project,
designed to make unused processing power existing on the computers of Juno's
subscribers available to third parties as an alternative to conventional
supercomputing resources. As designed, the project would involve dividing
computationally intensive problems into a large number of smaller computational
tasks, and distributing those smaller tasks to the computers of Juno subscribers
for such computers to process while the computers were not otherwise being used
by the subscribers. Management believes that commercial opportunities might
exist to sell this unused processing power to companies in fields such as
pharmaceutical research for biomedical or other applications.



    However, we face a number of significant risks in connection with the
Virtual Supercomputer Project and can give no assurance that such project will
be successful. The project is brand new. As of February 28, 2001, we had not
secured any customers for this project, and there can be no assurance that we
will be successful in identifying, locating or securing customers, in the
pharmaceutical field or any other field, that are willing to compensate Juno for
its subscribers' unused processing power. Prospective customers may raise
concerns about the security of their data, and there can be no assurance that
any steps we take to ensure such security will be effective or that
demonstrations of their effectiveness will be persuasive to such prospective
customers. Additionally, while we may require some or all subscribers to our
free basic service to participate in the Virtual Supercomputer Project as a
condition of using the service for free, there can be no assurance that a
material number of Juno's subscribers will be willing to participate in the
Virtual Supercomputer Project, even if their only alternative is to stop using
our free basic service, or that any who are willing will comply with the
requirements for participation, such as leaving their computers turned on when
not in use. Some members of the media and some subscribers have raised concerns
regarding whether the operation of the Virtual Supercomputer Project might harm
them or their computers in some way, and there can be no assurance that we will
be successful in allaying such concerns. If we are not successful in overcoming
consumer concerns, we may be unable to derive significant revenues from the
Virtual Supercomputer Project and we may experience significant subscriber
attrition. Additionally, Juno has not conducted large-scale tests of some of the
technology associated with the Virtual Supercomputer Project, and there can be
no assurances that such technology will operate successfully on the scale that
might be required by paying clients or at all. Unfavorable outcomes with regard
to any of the above could cause our business and financial results to suffer.


WE FACE POTENTIAL LIABILITY FOR INFORMATION TRANSMITTED OR RETRIEVED THROUGH OUR
  INTERNET SERVICES

    Our business and financial results may suffer if we incur liability as a
result of information transmitted or retrieved through our services. The
liability of Internet service providers and online services companies for
information transmitted or retrieved through their services is uncertain. It is
possible that claims may be filed against us based on a variety of theories,
including defamation, obscenity, negligence, copyright or trademark
infringement, or other theories based on the nature, publication or distribution
of this information. These types of claims have been brought, sometimes
successfully, against providers of Internet services in the past. Such claims,
with or without merit, would likely divert management time and attention and
result in significant costs to investigate and defend. In addition, if we become
subject to these types of claims and we are not successful in our defense, we
may be forced to pay substantial damages. We may also be forced to implement
expensive measures to alter the way our services are provided to avoid any
potential liability.

CHANGES IN GOVERNMENT REGULATION COULD DECREASE OUR REVENUES AND INCREASE OUR
  COSTS


    Changes in the regulatory environment could decrease our revenues and
increase our costs. As a provider of Internet access services, we are not
currently subject to direct regulation by the Federal


                                       28


Communications Commission. However, some telecommunications carriers have sought
to have communications over the Internet regulated by the FCC in the same manner
as other more traditional telecommunications services. Local telephone carriers
have also petitioned the FCC to regulate Internet access providers in a manner
similar to long distance telephone carriers and to impose access fees on these
providers and some developments suggest that they may be successful in obtaining
the treatment they seek. In addition, we operate our services throughout the
United States, and regulatory authorities at the state level may seek to
regulate aspects of our activities as telecommunications services. As a result,
we could become subject to FCC and state regulation as Internet services and
telecommunications services converge.


    We remain subject to numerous additional laws and regulations that could
affect our business. Because of the Internet's popularity and increasing use,
new laws and regulations with respect to the Internet are becoming more
prevalent. These laws and regulations have covered, or may cover in the future,
issues such as:

    - user privacy;

    - children's privacy;


    - pricing and disclosure of pricing terms;


    - intellectual property;

    - federal, state and local taxation;

    - advertising;

    - distribution; and

    - characteristics and quality of products and services.

    Legislation in these areas could slow the growth in use of the Internet
generally and decrease the acceptance of the Internet as a communications and
commercial medium.

    It may take years to determine how existing laws such as those governing
intellectual property, privacy, libel and taxation apply to the Internet. Any
new legislation or regulation regarding the Internet, or the application of
existing laws and regulations to the Internet, could harm us. Additionally, we
have begun to service a small number of subscribers who are located in Canada.
Laws and regulations relating to the Internet, or to doing business in Canada,
or similar laws and regulations in other jurisdictions should we choose to
continue to expand elsewhere outside of the United States, could have an adverse
effect on our business.

    The growth of the Internet, coupled with publicity regarding Internet fraud,
may also lead to the enactment of more stringent consumer protection laws. For
example, numerous bills have been presented to Congress and various state
legislatures designed to address the prevalence of unsolicited commercial bulk
e-mail on the Internet. These laws may impose additional burdens on our
business. Additionally, because we rely on the collection and use of personal
data from our subscribers for targeting advertising and other communications to
our subscribers, we may be harmed by any laws or regulations that restrict our
ability to collect or use this data. The Federal Trade Commission has conducted
investigations into the privacy practices of companies that collect information
about individuals on the Internet. The enactment of any additional laws or
regulations in this area, or renewed enforcement activity of existing laws and
regulations, may impede the growth of the Internet, which could decrease our
potential revenues or otherwise cause our business to suffer.

                                       29

FEDERAL TRADE COMMISSION ACTION COULD IMPACT OUR FINANCIAL RESULTS AND MARKETING
  PRACTICES


    The FTC has been investigating the advertising, billing and cancellation
practices of various Internet-related companies, including Juno. At the FTC's
request, we have provided marketing-related and customer service-related
information concerning our services. On the basis of these submissions, the FTC
staff has claimed, among other things, that Juno's disclosure practices about
the possibility of users incurring telephone charges were insufficient, and that
Juno's cancellation policies for subscribers to its billable services were
unduly restrictive. On the basis of our discussions with the FTC staff, we have
begun implementing modifications to the disclosure we make about
telecommunications charges that users might incur and to our billable services
cancellation practices. Depending on the final outcome of the FTC inquiry, we
could be required under a consent order or otherwise, to make compensatory
payments, to revise our advertising and marketing materials, and to make further
modifications to our business practices. As a result, our business and financial
results could suffer.


UNANTICIPATED DELAYS OR PROBLEMS IN THE INTRODUCTION OF NEW FEATURES OR SERVICES
  MAY CAUSE CUSTOMER DISSATISFACTION

    If we experience problems related to the reliability and quality of our
services or delays in the introduction of new versions of or enhancements to our
services, we could experience increased subscriber cancellations, adverse
publicity and reduced sales of advertising and products. Our services are very
complex and are likely to contain a number of undetected errors and defects,
especially when new features or enhancements are first released. Furthermore, in
order to introduce new features or enhancements, we may elect to license
technology from other companies rather than develop such features or
enhancements ourselves, and we may be exposed to undetected errors or defects in
third-party technology that is out of our control. Any errors or defects, if
significant, could harm the performance of these services, result in ongoing
redevelopment and maintenance costs and cause dissatisfaction on the part of
subscribers and advertisers. These costs, delays or dissatisfaction could
negatively affect our business.

WE ARE DEPENDENT ON THIRD-PARTY SOFTWARE TO ACCURATELY BILL SUBSCRIBERS TO OUR
  BILLABLE PREMIUM SERVICES


    The operation of our billable premium services requires the accurate
operation of billing system software as well as our development of policies
designed to reduce the incidence of credit card fraud and other forms of
uncollectible "chargebacks." If we encounter difficulty with the operation of
these systems, or if errors, defects or malfunctions occur in the operation of
these systems, this could result in erroneous overcharges to customers or in the
under-collection of revenue, either of which could hurt our business and
financial results.


RELATIONSHIPS WITH ENTITIES AFFILIATED WITH THE CHAIRMAN OF OUR BOARD OF
  DIRECTORS MAY PRESENT POTENTIAL CONFLICTS OF INTEREST

    The Chairman of our board of directors and our largest stockholder,
Dr. David E. Shaw, is the Chairman and Chief Executive Officer of D. E. Shaw &
Co., Inc., which is the general partner of D. E. Shaw & Co., L.P. ("DESCO,
L.P."), a securities firm whose activities focus on various aspects of the
intersection between technology and finance. Dr. Shaw and entities affiliated
with him are also involved in other technology-related businesses apart from our
company. As a result of these other interests, Dr. Shaw devotes only a portion
of his time to our company, and spends most of his time and energy engaged in
business activities unrelated to us. In addition to his indirect ownership of a
controlling interest in DESCO, L.P., Dr. Shaw may have a controlling interest in
these other businesses. Transactions between us and other entities affiliated
with Dr. Shaw may occur in the future and could result in conflicts of interest
that prove harmful to us.

                                       30


    We sublease office space in New York City from DESCO, L.P. Additionally our
subsidiary in Hyderabad, India subleases office space from an affiliate of
DESCO, L.P. We cannot be sure that we would be able to lease other space on
favorable terms in the event these subleases were to be terminated.



    In May 1999, we terminated an agreement with DESCO, L.P. under which
individuals employed by its affiliates located in India provided consulting
services to us. Following the termination of this agreement, these individuals
became employees of a Juno subsidiary located in Hyderabad, India.


OUR DIRECTORS AND OFFICERS EXERCISE SIGNIFICANT CONTROL OVER US


    As of February 28, 2001, the executive officers, directors, and persons and
entities affiliated with executive officers or directors beneficially owned in
the aggregate approximately 36.2% of our outstanding common stock. The Chairman
of our board of directors is Dr. David E. Shaw. Dr. Shaw continues to serve as
the Chairman and Chief Executive Officer of D. E. Shaw & Co., Inc., which is the
general partner of DESCO, L.P. As of February 28, 2001, Dr. Shaw and persons or
entities affiliated with him, including DESCO, L.P., beneficially owned, in the
aggregate, approximately 34.4% of our outstanding common stock as of that date.
As a result of this concentration of ownership, Dr. Shaw is able to exercise
significant influence over matters requiring approval by our stockholders,
including the election of directors and approval of significant corporate
transactions. This concentration of ownership could also have the effect of
delaying or preventing a change in control of Juno.


WE ARE DEPENDENT ON KEY MANAGEMENT PERSONNEL FOR OUR FUTURE SUCCESS

    Our business and financial results depend in part on the continued service
of our key personnel. Over the past year a number of senior financial, marketing
and technical executives have left the company or announced their intention to
do so. We do not carry key person life insurance on any of our personnel. The
loss of the services of any of our executive officers or the loss of the
services of other key employees could harm our business and financial results.

WE MAY NOT BE ABLE TO HIRE AND RETAIN QUALIFIED EMPLOYEES


    Our business and financial results depend in part on our ability to attract,
retain and motivate highly skilled employees. Competition for employees in our
industry can be intense. Concerns about developments in the Internet industry in
general, or about our company in particular, may make it more difficult than in
the past to retain our key employees or to attract, assimilate or retain other
highly qualified employees. We have from time to time in the past experienced
difficulty in hiring and retaining highly skilled employees with appropriate
qualifications, and we expect to continue to experience such difficulties. At
times, we have also experienced high rates of employee attrition, including the
departures of a number of our most senior managers. We are likely to experience
further such attrition, including of senior managers, in the future.


WE MAY NOT BE ABLE TO SUCCESSFULLY MAKE ACQUISITIONS OF OR INVESTMENTS IN OTHER
  COMPANIES

    Although in 2000 we entered into two transactions in which other companies
have referred their subscribers to us in return for compensation either
primarily or entirely in the form of Juno common stock, we have limited
experience in completing acquisitions of, or making investments in, companies or
their assets. From time to time we have had discussions with companies regarding
our acquiring, or investing in, their businesses, products or services, or
customers. If we buy a company, we could have difficulty in assimilating that
company's personnel and operations, and the key personnel of the acquired
company may decide not to work for us. We would expect that any acquisition may
present us with difficulties in assimilating the acquired services, technology
assets or customer bases into our operations. Similarly, subscriber referral
transactions may expose us to difficulties resulting from the

                                       31

conversion of subscribers from a competitive service to our own services. Any of
these difficulties could disrupt our ongoing business, and distract our
management and employees. In addition, these transactions could increase our
cash expenditures, and require the amortization of goodwill, both of which could
have an adverse effect on our financial results. To date we have issued equity
securities in order to pay for our subscriber referral transactions and we
expect to issue additional equity securities in satisfaction of our obligations
under subscriber referral transactions. In connection with any other
transactions we might choose to undertake in the future, we may issue additional
equity securities and may additionally assume indebtedness. The issuance of
equity securities could be dilutive to our existing stockholders and might, to
the extent such securities were sold into the public market, impair our ability
to draw down funding under the equity line facility.

WE COULD FACE ADDITIONAL REGULATORY REQUIREMENTS, TAX LIABILITIES AND OTHER
  RISKS IF WE DECIDE TO EXPAND INTERNATIONALLY

    We currently provide services to a small number of users who are located in
Canada. We may decide to increase the international availability of our
services, and we believe that any international operations would be subject to
most of the risks of our business generally. In addition, there are risks
inherent in doing business in international markets, such as changes in
regulatory requirements, tariffs and other trade barriers, fluctuations in
currency exchange rates, and adverse tax consequences, and there are likely to
be different consumer preferences and requirements in such markets. We cannot
assure you that one or more of these factors would not harm any future
international operations.

WE HAVE ANTI-TAKEOVER PROVISIONS WHICH MAY MAKE IT DIFFICULT FOR A THIRD PARTY
  TO ACQUIRE US

    Provisions of our certificate of incorporation, our bylaws and Delaware law
could make it more difficult for a third party to acquire us, even if doing so
might be beneficial to our stockholders.

WE DO NOT PLAN TO PAY DIVIDENDS IN THE FORESEEABLE FUTURE AND, AS A RESULT,
  STOCKHOLDERS WILL NEED TO SELL SHARES TO REALIZE A RETURN ON THEIR INVESTMENT

    We have not declared or paid any cash dividends on our capital stock since
inception. We intend to retain any future earnings to finance the operation and
expansion of our business and do not anticipate paying any cash dividends in the
foreseeable future. Consequently, stockholders will need to sell shares of
common stock in order to realize a return on their investment, if any.

                                       32

                       COMMON STOCK INVESTMENT AGREEMENT

OVERVIEW

    On October 6, 2000, we entered into a common stock investment agreement with
an affiliate of The Kingston Limited Partnership providing for the potential
future issuance and purchase of shares of our common stock. The common stock
investment agreement and a related registration rights agreement were assigned
to, and assumed by, Kingston, a limited partnership organized and existing under
the laws of Bermuda. The common stock investment agreement establishes what is
sometimes termed an equity line facility. The following description of the
common stock investment agreement does not purport to be complete and is subject
to, and qualified in its entirety by, the common stock investment agreement,
which we have included as an exhibit to the registration statement of which this
prospectus forms a part.

    Under the agreement, Kingston has committed to provide us up to
$125 million as we request it over a period of up to 24 months, subject to
various limitations that reduce the total amount actually available to us under
the facility. In return for funds provided under the facility, if any, Kingston
will receive shares of our common stock. We will be able to request amounts
under the equity line facility in increments of $100,000 totaling no less than
$500,000 and no more than $7,500,000 per drawdown period, with each such
drawdown period lasting 22 trading days. In respect of each trading day during a
drawdown period, we will receive from Kingston 1/22 of the total amount
requested for such drawdown period, subject to certain reductions discussed
below. We may deliver up to 20 separate drawdown notices to Kingston during the
term of our agreement, provided that we may not deliver a drawdown notice during
an ongoing drawdown period. We are under no obligation to issue any minimum
number of drawdown requests; however, the equity line facility may be terminated
if we do not sell any shares to Kingston for a period of four consecutive
months. Purchases under any drawdown request will commence starting on the fifth
trading day following the date our drawdown notice is received by Kingston,
unless we have not issued a drawdown request during the prior 90-day period, in
which case purchases will commence starting on the ninth trading day following
the date of our notice to Kingston.

    The actual number and dollar value of shares purchased on any given trading
day during a given drawdown period are determined at the end of each trading day
during such drawdown period based on a discount to the volume-weighted average
stock price during that day, subject to various adjustments described below.

    The per-share dollar amount Kingston pays for our common stock with respect
to any trading day during a drawdown period will generally be 94% of the
volume-weighted average price of our common stock for that day, subject to the
adjustments described below. Ladenburg Thalmann & Co. Inc., the placement agent
that introduced us to Kingston and helped in structuring the equity line
facility, will receive a cash fee from us equal to 4% of any amount we draw down
under the facility.

    We are currently registering 10,000,000 shares of common stock for possible
issuance under the common stock investment agreement. The common stock
investment agreement provides that Kingston may not purchase a number of shares
that, when added to all other shares purchased under the agreement, would exceed
19.99% of the number of shares of our common stock issued and outstanding on
October 6, 2000, the date of the execution and delivery of the common stock
investment agreement, unless either we obtain stockholder approval of issuances
in excess of that amount, or Kingston is advised by counsel that the rules of
the principal market or exchange on which our shares are quoted or listed would
permit such an issuance without stockholder approval. The listing requirements
of The Nasdaq National Market, currently the principal market for our common
stock, prohibit us from issuing common stock in a single transaction if the
shares may be issued for less than the greater of market value or book value and
the number of shares to be issued would exceed 20% of the number of shares of
common stock outstanding before the issuance.

                                       33


    We have requested stockholder approval for sales under the equity line
facility of up to 12,000,000 shares in connection with our annual meeting
scheduled for May 16, 2001.


    In addition, the common stock investment agreement does not permit us to
draw down funds if the issuance of shares of common stock to Kingston pursuant
to a drawdown would result in Kingston and its affiliates owning more than 9.99%
of our then outstanding common stock.


    As of March 2001, we had issued 317,400 shares of our common stock under the
equity line facility for aggregate net proceeds of $498,641.


THE DRAWDOWN NOTICE PROCEDURE


    We may request a drawdown by delivering a drawdown notice to Kingston,
stating the total amount we wish to draw down during the associated drawdown
period and a designated minimum price, if any, below which we are not willing to
sell any shares to Kingston. Absent a waiver of the minimum purchase price
requirement under the facility by the parties, the designated minimum price per
share may not be less than $1.50 or greater than 85% of the volume-weighted
average price of our common stock on the trading day immediately preceding the
delivery of such drawdown notice. If we do not specify a designated minimum
price in a given drawdown notice, then the designated minimum price per share
for such drawdown period will be $1.50. Accordingly, Kingston generally will not
be obligated to purchase common stock under the equity line facility at a
purchase price below $1.50. On February 14, 2001, we and Kingston agreed to a
mutual waiver under which the minimum price at which shares could be sold under
the facility was reduced from $2.50 per share to $1.50 per share for the period
from February 15, 2001 to March 12, 2001. In addition, we and Kingston entered
into an amendment to the common stock investment agreement under which the
minimum purchase price level was reduced from $2.50 per share to $1.50 per share
on March 29, 2001. We and Kingston may agree in the future to reduce the minimum
purchase price under the equity line facility, either through limited waivers or
further amendments to the common stock investment agreement, and, accordingly,
sales may occur at a purchase price of less than $1.50 per share.


AMOUNT OF THE DRAW AND NUMBER OF SHARES

    Subject to the reductions described below, the dollar amount Kingston will
purchase in respect of each trading day during a drawdown period will be equal
to 1/22 of the total dollar amount we have requested to draw in the related
drawdown notice. The purchase price per share on any given trading day will be
an amount equal to the greater of 94% of the volume-weighted average per share
price of our common stock on that trading day or the designated minimum price
for such drawdown period. The number of shares purchased on a particular trading
day will, subject to the reductions described below, be equal to 1/22 of the
total dollar amount we have requested to draw divided by the purchase price per
share.

    The dollar value of purchases by Kingston, and the number of shares to be
issued to Kingston, on a given trading day will, if applicable, be automatically
adjusted to equal the lowest amount derived based on the following calculations:

    - on any trading day during a drawdown period on which (1) 94% of the
      volume-weighted average price of our common stock for such trading day is
      less than the designated minimum price for that drawdown period and
      (2) the product of the designated minimum price and the number of shares,
      if any, sold by Kingston during such trading day at a price greater than
      or equal to the designated minimum price is less than 1/22 of the total
      dollar amount requested in the applicable drawdown notice, then the dollar
      amount we will receive from Kingston in respect of that trading day will
      be adjusted to equal the designated minimum price multiplied by the number
      of shares of our common stock sold by Kingston on that day, or to zero if
      Kingston has not sold any shares on that day;

                                       34

    - if a registration statement for the resale by Kingston of any shares to be
      purchased from us is not effective, or a prospectus is not available for
      use by Kingston for the sale of such shares, or if trading of our common
      stock is suspended or halted on the principal market for our shares,
      currently the Nasdaq Stock Market, for more than one hour or trading on
      our principal market in general is halted for more than one hour, then the
      dollar amount we will receive from Kingston in respect of that trading day
      will be adjusted to equal the number of shares, if any, of our common
      stock sold by Kingston during the period that a registration statement or
      prospectus was available for use on that trading day or, in the event of a
      suspension or halt, during the period for which trading was permitted on
      our principal market on that day, multiplied by the applicable per share
      purchase price for such day, such purchase price being the greater of the
      designated minimum price and 94% of the volume-weighted average price for
      the available portion of such trading day; and

    - if 1/22 of the total dollar amount we have requested to draw during the
      drawdown period would exceed 13.64% of the average daily dollar volume of
      sales of our common stock on our principal market over the period of 22
      trading days immediately preceding the date of our drawdown notice to
      Kingston, then the dollar amount we will receive from Kingston in respect
      of that trading day will be reduced so that it equals 13.64% of that
      average daily dollar volume.

    If more than one of the foregoing adjustments is applicable, only the
adjustment which results in the greatest downward adjustment will be taken. In
addition, with respect to any trading day during a drawdown period, Kingston
will not be obligated to purchase a number of shares greater than the lowest of
(1) 1/22 of the total dollar amount requested for that drawdown period divided
by the applicable purchase price for such trading day, (2) 25% of that day's
share trading volume or (3) 15% of the previous day's share trading volume. For
all calculations of share trading volume, any individual trades of at least
60,000 shares shall each be treated as a trade of 60,000 shares.

NECESSARY CONDITIONS BEFORE KINGSTON IS OBLIGATED TO PURCHASE OUR SHARES

    The following conditions must be satisfied before Kingston is obligated to
purchase the shares of common stock that we might wish to sell from time to
time:


    - a registration statement covering at least 5,000,000 shares of common
      stock, or the greatest amount permitted by the Securities and Exchange
      Commission, if less than 5,000,000 shares, must be declared effective by
      the Securities and Exchange Commission and must remain effective and
      available as of each date on which a closing of a purchase and sale of
      shares occurs for making resales of the common stock purchased by
      Kingston;


    - the disclosures contained or incorporated by reference in the registration
      statement and related prospectus relating to the resales by Kingston shall
      be acceptable to Kingston in its good faith opinion;

    - we must have performed our obligations under the common stock investment
      agreement, the related registration rights agreement and any other
      agreement between us and Kingston and not be in default under any of those
      agreements;

    - the representations and warranties to Kingston contained in the common
      stock investment agreement must be true and correct as of the date we
      submit a drawdown request and on each date on which a closing of a
      purchase and sale of shares occurs;

    - there shall not have occurred or be pending a tender offer by us for 20%
      or more of our common stock, a "going private" transaction affecting us or
      a "change of control," defined as:

       - a sale or transfer of all or substantially all of our assets to another
         company, other than to existing stockholders and their affiliates;

                                       35

       - any person together with its affiliates, other than affiliates of
         selected existing stockholders, obtaining beneficial ownership of 50%
         or more of our voting power; or

       - a replacement of more than one-half of our board of directors that is
         not approved by the members of the board of directors on the date of
         such replacement;

    - no statute, rule, regulation, executive order, decree, ruling or
      injunction may be in effect which prohibits consummation of the
      transactions contemplated by the common stock investment agreement; and

    - our common stock shall be approved for quotation on the Nasdaq Stock
      Market or another approved market and trading in our common stock must not
      have been suspended by the Securities and Exchange Commission or The
      Nasdaq National Market or such other approved market, nor shall minimum
      prices have been established on securities whose trades are reported by
      The Nasdaq National Market or such other approved market.

    On each date of a closing for the purchase and sale of common stock under
the common stock investment agreement, we must deliver certificates from certain
of our officers. In addition, we must deliver a "comfort" letter from our
accountants as to selected financial information contained in the registration
statement on a quarterly basis and an opinion about some of these matters from
our counsel on each date that we issue a drawdown notice.

    A further condition is that Kingston may not purchase a number of shares
exceeding 19.99% of the number of shares of our common stock that were issued
and outstanding on October 6, 2000, the date we entered into the common stock
investment agreement, without our first obtaining approval from our stockholders
for such excess issuance.


    We have requested stockholder approval for sales under the equity line
facility of up to 12,000,000 shares in connection with our annual meeting
scheduled for May 16, 2001.


ADDITIONAL COVENANTS UNDER THE COMMON STOCK INVESTMENT AGREEMENT

    We have agreed with Kingston under the common stock investment agreement:

    - to provide Kingston with copies of reports we file with the Securities and
      Exchange Commission and press releases we issue;

    - not to enter into, amend, modify or supplement agreements with our
      officers, directors, persons who were officers or directors at any time
      during the previous two years, 5% owners of our stock or their affiliates
      except for customary employment and benefit arrangements or agreements
      approved by a majority of our disinterested directors;

    - to reimburse Kingston for reasonable fees and expenses actually incurred,
      including reasonable legal expenses, relating to its due diligence,
      negotiation and execution of the transactions under the agreement, subject
      to certain limitations;

    - not to adopt a shareholder rights plan or similar arrangement relating to
      our common stock that could be triggered by Kingston's exercise of its
      rights and obligations under the common stock investment agreement; and

    - to cause the shares issuable to Kingston under the common stock investment
      agreement to be registered as described under "Plan of
      Distribution--Limited grant of registration rights" below.

    In the event that, within a specified amount of time following the
completion of a given drawdown period, our common stock is no longer approved
for listing or quotation on the Nasdaq Stock Market, the New York Stock Exchange
or the American Stock Exchange or the registration statement or prospectus are
unavailable for Kingston's resale of shares they purchased from us and still
hold, we

                                       36

have agreed to repurchase some or all such shares from Kingston at Kingston's
purchase price, upon Kingston's request.

    In addition, we have agreed to indemnify Kingston and its affiliates, agents
and representatives for any liabilities, costs and expenses, including
reasonable attorneys' fees, incurred as a result of, arising out of or relating
to:

    - any misrepresentation or breach of any representation or warranty made by
      us under any of the documents delivered in connection with the common
      stock investment agreement;

    - any breach of any of our covenants, agreements or obligations under the
      agreements delivered in connection with the common stock investment
      agreement; and

    - any cause of action, suit or claim brought or made by a third party and
      arising out of or resulting from the execution, delivery, performance,
      breach by us or enforcement of the documents delivered in connection with
      the common stock investment agreement, any transaction financed or to be
      financed in whole or in part, directly or indirectly, with the proceeds of
      the issuance of the shares of our common stock to Kingston, the status of
      Kingston as an investor in the common stock and the enforcement of our
      indemnification obligations.

MECHANICS OF PURCHASE OF SHARES BY KINGSTON

    To effect a purchase of shares, Kingston must deliver on each trading day
during a drawdown period a written notice to us stating:

    - the aggregate purchase price for the shares being purchased by Kingston
      pursuant to such purchase notice;

    - the purchase price per share;

    - the number of shares Kingston is purchasing pursuant to such purchase
      notice;

    - the date of the closing of the purchase by Kingston of such shares, which
      will not occur later than 10:00 am New York City time on the eleventh
      trading day after the date of the purchase notice; and

    - that Kingston is then in compliance with limitations contained in the
      common stock investment agreement regarding the assumption or maintenance
      of a net short position in our stock.

    Notwithstanding Kingston's obligation to deliver notices during a drawdown
period, Kingston's failure to deliver any such notice will not affect Kingston's
obligation to purchase shares in respect of that trading day. There will be a
maximum of 7 closings scheduled by us and Kingston with respect to any
particular drawdown period, excluding any closings at which either one or both
of us fails to perform its obligations under the common stock investment
agreement.

REMEDIES FOR CERTAIN BREACHES AND TERMINATION OF THE COMMON STOCK INVESTMENT
  AGREEMENT

    If we fail to deliver the appropriate number of shares to Kingston within 1
trading day following the date on which the closing for such shares was
scheduled, then Kingston will not purchase any additional shares until such
failure has been fully cured by us and the appropriate number of shares has been
delivered to Kingston. Such drawdown period will then be extended by a number of
trading days equal to the number of trading days from the scheduled closing date
to the date of such cure. If such failure is not cured by us after four trading
days following the date on which the closing for such shares was scheduled, then
(1) the current drawdown period will immediately terminate and Kingston will
have no further obligations to purchase any additional shares from us with
respect to such terminated drawdown period and (2) Kingston may, during the
period of 10 trading days following such fourth trading day, purchase in the
open market the number of shares that we failed to deliver and we must,

                                       37

upon receipt of a notice of such purchase, reimburse Kingston for the cost of
such purchase, each such purchase and reimbursement being called a "Buy-in." If
we fail to pay such reimbursement within 3 trading days of receipt of such
notice, then we must pay Kingston, on the first trading day following such third
trading day, in addition to, and not in lieu of, such reimbursement amount
payable by us to Kingston, an amount equal to 2% of the reimbursement amount per
period of 22 trading days, or portion thereof, until the reimbursement amount is
paid in full. If no Buy-in occurs with respect to a certain number of shares and
our failure to deliver such shares to Kingston is not cured by us by the close
of business on the thirteenth trading day following such scheduled closing date,
the common stock investment agreement will terminate upon the delivery by
Kingston of a notice regarding such excessively delayed closing. Following the
delivery of such notice, Kingston will not have any further obligation to
purchase any additional shares from us under the common stock investment
agreement.

    If we fail to satisfy any of the conditions of Kingston's obligations to
purchase shares on any trading day during a drawdown period or on any scheduled
closing date, then Kingston will not purchase any additional shares from us
pursuant to the common stock investment agreement until such condition has been
fully satisfied by us and the drawdown period will be extended by a number of
trading days equal to the number of trading days from such purchase day or
scheduled closing date, as applicable, to the date of such satisfaction by us.
If such condition is not fully satisfied by us after the fourth trading day
following such purchase day or scheduled closing date, as applicable, the then
current drawdown period will immediately terminate, and Kingston will not have
any further obligations to purchase any additional shares with respect to such
terminated drawdown period. If such condition is not fully satisfied by us after
thirteen trading days following such trading day or scheduled closing date, as
applicable, then the common stock investment agreement will terminate upon
Kingston's delivery of a notice of a delayed closing to us. Following delivery
of such notice, Kingston will not have any further obligations to purchase any
additional shares from us. However, Kingston generally may not deliver a notice
of a delayed closing during the period when we have suspended Kingston's sales
under this prospectus in accordance with the terms of the registration rights
agreement.

    The common stock investment agreement will automatically terminate upon the
earlier of the sale of shares of our common stock having an aggregate purchase
price of $125,000,000 or two years after the date on which the registration
statement of which this prospectus forms a part is first declared effective by
the Securities and Exchange Commission.

    In addition, Kingston may elect to terminate the agreement under the
following circumstances:


    - our common stock is not either approved for quotation on the Nasdaq Stock
      Market or listed on the American or New York Stock Exchange for a period
      of three consecutive trading days;


    - we fail to sell any shares to Kingston under the agreement for a period of
      122 calendar days;

    - we fail to deliver to Kingston the proper number of shares within one
      trading day following any scheduled closing for the purchase and sale of
      shares on more than three separate occasions during a 12-month period;

    - we enter into an equity line agreement with any party other than Kingston
      or one of its affiliates;

    - on more than two occasions in a 12-month period or for more than 60 days,
      or under some circumstances 13 days, on one occasion we exercise our right
      to suspend Kingston's sales under this prospectus, as amended or
      supplemented, in accordance with the terms of our registration rights
      agreement with Kingston;

    - Kingston receives notice from a governmental or self-regulatory agency
      that it does not then possess one or more required approvals to perform
      its obligations under the agreement; or

    - we are unable under the rules of the Securities and Exchange Commission to
      repurchase shares from Kingston upon Kingston's request as described above
      during a period when the registration

                                       38

      statement or prospectus are unavailable for the sale of shares purchased
      by Kingston under the common stock investment agreement or our common
      stock is not approved for listing or quotation on the Nasdaq Stock Market,
      the New York Stock Exchange or the American Stock Exchange.

    We may elect to terminate the common stock investment agreement under the
following circumstances:

    - Kingston fails to deliver the appropriate funds to us for the purchase of
      shares pursuant to the agreement either by the close of business on the
      thirteenth trading day following any scheduled closing date or within one
      trading day after any scheduled closing date on more than three occasions
      in any 12-month period;

    - Kingston exercises any of its rights under the agreement or the
      registration rights agreement so as to not purchase some or all of the
      shares specified by us in a validly delivered drawdown notice, other than
      due to purchase price adjustments provided for in the agreement; or

    - Kingston receives notice from a governmental or self-regulatory agency
      that it does not then possess one or more required approvals to perform
      its obligations under the agreement.

                                USE OF PROCEEDS

    We will not receive any of the proceeds from the sale of shares by Kingston
that it has obtained under the common stock investment agreement. However, we
will receive the net proceeds from the sale of any common stock to Kingston
under the common stock investment agreement described in this prospectus. We
expect to use the proceeds, if any, of any such sales for general working
capital purposes.

    Pursuant to the terms of the common stock investment agreement, we may
choose not to sell any shares of our common stock to Kingston under the equity
line facility. Our decision to choose to sell shares under the equity line
facility will be based on a number of factors, including the availability of any
alternative sources of funding, the size of our cash reserves, our liquidity
needs and other factors.

                              SELLING STOCKHOLDER

OVERVIEW

    The number of shares we are registering is based in part on a good faith
estimate by us of the number of shares we might issue to Kingston under the
common stock investment agreement. However, due to possible changes in our stock
price, trading volume, and capital needs, as well as in the market overall, the
number of shares we are currently registering for issuance under the common
stock investment agreement may be significantly higher or lower than the number
we ultimately issue under the common stock investment agreement and the number
resold by Kingston under this prospectus.

THE KINGSTON LIMITED PARTNERSHIP


    Kingston is engaged in the business of trading securities for its own
account. Kingston's principal offices are located at Cedar House, 41 Cedar
Avenue, Hamilton HM12, Bermuda. Kingston currently owns 168,000 shares of Juno
common stock. Other than its obligation to purchase common stock under the
common stock investment agreement, it has no other commitments or arrangements
to purchase or sell any of our securities. There are no business relationships
between Kingston and us other than the common stock investment agreement.


                                       39

                              PLAN OF DISTRIBUTION

    Kingston is offering the shares of common stock offered hereby for its own
account. We will not receive any proceeds from the sale of shares of common
stock by Kingston. Over the term of the equity line facility, Kingston may be
offering for sale up to 10,000,000 shares of common stock acquired by it
pursuant to the terms of the common stock investment agreement more fully
described under the section above entitled "common stock investment agreement."

    Kingston may, from time to time, sell all or a portion of the shares:

    - on the Nasdaq National Market, or on such other exchange or market where
      our stock is traded;

    - in privately negotiated transactions;

    - by delivery of shares in settlement to option/short sales transactions
      entered into after the date that the registration statement of which this
      prospectus forms a part becomes effective with the Securities and Exchange
      Commission;

    - in block trades;

    - in any combination of such methods of sale; and

    - in any other legal method of disposition.

    Kingston will make such sales at fixed prices that may be changed, at market
prices prevailing at the time of sale, at prices related to such prevailing
prices, or at negotiated prices. Kingston is not restricted as to the price at
which it may sell the shares offered by this prospectus.

    Kingston may effect sales by selling to or through one or more
broker-dealers, and such broker-dealers may receive compensation in the form of
underwriting discounts, concessions or commissions from Kingston.

    Any broker-dealer participating in such transactions as agent may receive
commissions from Kingston, and if it acts as agent for the purchaser of the
shares, from the purchaser. Broker-dealers may agree with Kingston to sell a
specified number of shares at a stipulated price per share. To the extent a
broker-dealer is unable to do so acting as agent for Kingston, it will purchase
as principal any unsold shares at the price required to fulfill its commitment
to Kingston. Broker-dealers who acquire shares as principal may resell the
shares from time to time in transactions that may involve block transactions of
the nature described above, in the over-the-counter market or otherwise at
prices and on terms prevailing at the time of sale, at prices related to the
then-current market price or in negotiated transactions. In connection with such
resales, broker-dealers may pay to or receive from the purchasers of the shares
commissions computed as described above.

    Kingston is an "underwriter" as defined in the Securities Act of 1933 in
connection with the sale of the shares offered by this prospectus. Any
broker-dealers or agents that participate with Kingston in sales of the shares
may be deemed to be "underwriters" within the meaning of the Securities Act of
1933 in connection with sales in which they participate. If any broker-dealers
or agents are deemed to be "underwriters," then any commissions they receive and
any profit on the resale of the shares purchased by them may be considered to be
underwriting commissions or discounts under the Securities Act of 1933.

    From time to time, within limitations specified in the common stock
investment agreement, Kingston may engage in short sales, short sales against
the box, puts and calls and other transactions in our common stock, and may sell
and deliver the shares in connection with these transactions or to settle
securities loans. If Kingston engages in such transactions, the price of our
common stock may be affected. From time to time Kingston may pledge its shares
pursuant to the margin provisions of its

                                       40

agreements with its brokers. Upon a default by Kingston, the broker may offer
and sell the pledged shares from time to time.

    Kingston and any other persons participating in the sale or distribution of
the shares will be subject to the Securities Exchange Act of 1934 and the
related rules and regulations, including Regulation M, to the extent it applies.
The Securities Exchange Act and related rules may limit the timing of purchases
and sales of any of the shares by Kingston or any other such person that may
affect the marketability of the shares. Kingston also must comply with the
applicable prospectus delivery requirements under the Securities Act in
connection with the sale or distribution of the shares.

LIMITED GRANT OF REGISTRATION RIGHTS

    We granted registration rights to Kingston to enable it to sell the common
stock it purchases under the common stock investment agreement. In connection
with any such registration, we will have no obligation:

    - to assist or cooperate with Kingston in the offering or disposition of
      such shares;

    - to indemnify or hold harmless the holders of any such shares (other than
      Kingston) or any underwriter designated by such holders;

    - to obtain a commitment from an underwriter relative to the sale of any
      such shares; or

    - to include such shares within any underwritten offering we do.

    We will assume no obligation or responsibility whatsoever to determine a
method of disposition for such shares or to otherwise include such shares within
the confines of any registered offering other than the registration statement of
which this prospectus is a part.

    Kingston has agreed not to distribute any common stock purchased from us
pursuant to the common stock investment agreement other than in accordance with
the plan of distribution included in this prospectus. We will use our best
efforts to file, during any period during which we are required to do so under
our registration rights agreement with Kingston, one or more post-effective
amendments to the registration statement of which this prospectus is a part to
describe any material information with respect to the plan of distribution not
previously disclosed in this prospectus or any material change to such
information in this prospectus. This obligation may include, to the extent
required under the Securities Act of 1933, that a supplemental prospectus be
filed, disclosing

    - the name of any broker-dealers;

    - the amount of common stock involved;

    - the price at which the common stock is to be sold;

    - the commissions paid or discounts or concessions allowed to
      broker-dealers, where applicable;

    - that broker-dealers did not conduct any investigation to verify the
      information set out or incorporated by reference in this prospectus, as
      supplemented; and

    - any other facts material to the transaction.

    We must notify Kingston if the prospectus included in the registration
statement contains an untrue statement of a material fact or omits to state a
material fact. Our registration rights agreement with Kingston permits us to
restrict the resale of the shares Kingston has purchased from us under the
common stock investment agreement for a period of time sufficient to permit us
to amend or supplement this prospectus to include material information.

                                       41

    We have agreed to bear all reasonable expenses other than underwriting
discounts and commissions of any underwriters, brokers, sellers or agents
retained by Kingston, in connection with the registration of the shares being
offered by Kingston.

PLACEMENT AGENT

    Ladenburg Thalmann & Co. Inc. has acted as placement agent in connection
with the common stock investment agreement. Ladenburg introduced us to Kingston
and assisted us with structuring the equity line facility. Ladenburg's duties as
placement agent were undertaken on a reasonable best efforts basis only. It made
no commitment to purchase shares from us and did not ensure us of the successful
placement of any securities.


    In consideration for Ladenburg's services as placement agent, we have agreed
to pay Ladenburg a cash fee equal to 4% of the amount of each drawdown under the
equity line facility. As of March 2001, we had paid placement agent fees of
$20,777, or 4% of the gross proceeds drawn down under the equity line facility,
to Ladenburg Thalmann & Co. Inc. In addition, we will pay all of Ladenburg's
expenses in connection with its duties as placement agent, up to an aggregate of
$15,000. We have no material relationship with Ladenburg, other than in
connection with this transaction. Ladenburg has no material relationship with
Kingston.


                                 LEGAL MATTERS

    The validity of the shares offered hereby will be passed upon for us by
Brobeck, Phleger & Harrison LLP, New York, New York.

                                    EXPERTS


    The financial statements incorporated in this prospectus by reference to the
Annual Report on Form 10-K for the year ended December 31, 2000, have been so
incorporated in reliance on the report of PricewaterhouseCoopers LLP,
independent accountants, given on the authority of said firm as experts in
auditing and accounting.


                                       42

                               10,000,000 SHARES

                           JUNO ONLINE SERVICES, INC.

                                  COMMON STOCK

                                     [LOGO]

                                   PROSPECTUS


                                 MARCH   , 2001


                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

    The following table sets forth an estimate of the expenses, other than the
placement agent fees, underwriting discounts and commissions, to be incurred by
Registrant in connection with the issuance and distribution of the securities
being registered hereby. All such expenses will be borne by Juno Online
Services, Inc.:



                                                              AMOUNT TO
                                                               BE PAID
                                                              ---------
                                                           
SEC Registration Fee........................................  $  6,517
Nasdaq National Market Listing Fee..........................   100,000*
Legal Fees and Expenses.....................................   270,000**
Accounting Fees and Expenses................................   100,000
Miscellaneous...............................................    53,483
                                                              --------
Total.......................................................  $530,000
                                                              ========


- ------------------------

*   Such amount will be reduced to the extent such fees would exceed either
    $17,500 in any calendar quarter, or $35,000 in any calendar year.

**  Approximately $35,000 of which has been paid by the selling stockholder. In
    addition, the Registrant has agreed to reimburse the selling stockholder
    quarterly for up to $20,000 of additional expenses reasonably incurred after
    the date hereof.

ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS

    The registrant's Amended and Restated Certificate of Incorporation (the
"Certificate") provides that the liability of a director of the registrant shall
be eliminated or limited to the fullest extent permitted by the Delaware General
Corporation Law, as amended (the "DGCL"). Under the DGCL, the directors have a
fiduciary duty to the registrant which is not eliminated by this provision of
the Certificate and, in appropriate circumstances, equitable remedies such as
injunctive or other forms of non-monetary relief will remain available. In
addition, each director will continue to be subject to liability under the DGCL
for breach of the director's duty of loyalty to the registrant, for acts or
omissions which are found by a court of competent jurisdiction to be not in good
faith or involving intentional misconduct, for knowing violations of law, for
actions leading to improper personal benefit to the director, and for payment of
dividends or approval of stock repurchases or redemptions that are prohibited by
DGCL. This provision also does not affect the directors' responsibilities under
any other laws, such as the Federal securities laws or state or Federal
environmental laws. The registrant has obtained liability insurance for its
officers and directors.

    Section 145 of the DGCL empowers a corporation to indemnify its directors
and officers and to purchase insurance with respect to liability arising out of
their capacity or status as directors and officers, provided that this provision
shall not eliminate or limit the liability of a director: (i) for any breach of
the director's duty of loyalty to the corporation or its stockholders, (ii) for
acts or omissions not in good faith or which involve intentional misconduct or a
knowing violation of law, (iii) arising under Section 174 of the DGCL, or
(iv) for any transaction from which the director derived an improper personal
benefit. The DGCL provides further that the indemnification permitted thereunder
shall not be deemed exclusive of any other rights to which the directors and
officers may be entitled under the corporation's bylaws, any agreement, a vote
of stockholders or otherwise. The Certificate

                                      II-1

eliminates the personal liability of directors to the fullest extent permitted
by Section 102(b)(7) of the DGCL and provides that the registrant shall fully
indemnify any person who was or is a party or is threatened to be made a party
to any threatened, pending or completed action, suit or proceeding whether
civil, criminal, administrative or investigative, by reason of the fact that
such person is or was a director or officer of the registrant, or is or was
serving at the request of the registrant as a director or officer of another
corporation, partnership, joint venture, trust, employee benefit plan or other
enterprise, against expenses (including attorney's fees), judgments, fines and
amounts paid in settlement actually and reasonably incurred by such person in
connection with such action, suit or proceeding.

ITEM 16. EXHIBITS

    The following is a list of Exhibits filed as part of the Registration
Statement:



                     
         5.1            Opinion of Brobeck, Phleger & Harrison LLP.*

        10.1            Common Stock Investment Agreement, dated as of October 6,
                        2000 between the Registrant and Westgate International,
                        L.P.*

        10.2            Registration Rights Agreement, dated October 6, 2000,
                        between the Registrant and Westgate International, L.P.*

        10.3            Assignment and Assumption Agreement, dated November 20,
                        2000, by and between Westgate International, L.P. and The
                        Kingston Limited Partnership.*

        10.4            Amendment No. 1 to the Common Stock Investment Agreement and
                        the Registration Rights Agreement, dated as of March 29,
                        2001, by and between the Registrant and The Kingston Limited
                        Partnership.

        23.1            Consent of Brobeck, Phleger & Harrison LLP (included in the
                        opinion filed as Exhibit 5.1).

        23.2            Consent of PricewaterhouseCoopers LLP, independent
                        accountants.

        24.1            Power of Attorney.*



- ------------------------

* Previously filed.

ITEM 17. UNDERTAKINGS

    Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the provisions described in Item 15 above, or otherwise,
the Registrant has been advised that in the opinion of the Securities and
Exchange Commission such indemnification is against public policy as expressed
in the Act, and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than payment by the Registrant
of expenses incurred or paid by a director, officer or controlling person of the
Registrant in the successful defense of any action, suit or proceeding) is
asserted by such director, officer or controlling person in connection with the
securities being registered, the Registrant will, unless in the opinion of its
counsel the matter has been settled by controlling precedent, submit to a court
of appropriate jurisdiction the question whether such indemnification by it is
against public policy as expressed in the Act and will be governed by the final
adjudication of such issue.

    The undersigned Registrant hereby undertakes:

    (1) To file, during any period in which offers or sales are being made of
the securities offered hereby, a post-effective amendment to this Registration
Statement;

    (i) To include any prospectus required by Section 10(a)(3) of the Securities
       Act of 1933;

                                      II-2

    (ii) To reflect in the prospectus any facts or events arising after the
       effective date of the registration statement (or the most recent
       post-effective amendment thereof) which, individually or in the
       aggregate, represent a fundamental change in the information set forth in
       the registration statement. Notwithstanding the foregoing, any increase
       or decrease in volume of securities offered (if the total dollar value of
       securities offered would not exceed that which was registered) and any
       deviation from the low or high end of the estimated maximum offering
       range may be reflected in the form of prospectus filed with the
       Commission pursuant to Rule 424(b) if, in the aggregate, the changes in
       volume and price represent no more than a 20 percent change in the
       maximum aggregate offering price set forth in the "Calculation of
       Registration Fee" table in the effective registration statement;

    (iii) To include any material information with respect to the plan of
       distribution not previously disclosed in the registration statement or
       any material change to such information in the registration statement;

    provided, however, that the undertakings set forth in paragraphs (i) and
(ii) above do not apply if the registration statement is on Form S-3 and the
information required to be included in a post-effective amendment by those
paragraphs is contained in periodic reports filed by the registrant pursuant to
Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are
incorporated by reference in this registration statement.

    (2) That, for the purpose of determining any liability under the Securities
Act of 1933, each such post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.

    (3) To remove from registration by means of a post-effective amendment any
of the securities being registered which remain unsold at the termination of the
offering.

    The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Securities Exchange Act of 1934 that is incorporated by reference in the
registration statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial BONA FIDE offering thereof.

    The undersigned registrant hereby undertakes to deliver or cause to be
delivered with the prospectus, to each person to whom the prospectus is sent or
given, the latest annual report, to security holders that is incorporated by
reference in the prospectus and furnished pursuant to and meeting the
requirements of Rule 14a-3 or Rule 14c-3 under the Securities Exchange Act of
1934; and, where interim financial information required to be presented by
Article 3 of Regulation S-X is not set forth in the prospectus, to deliver, or
cause to be delivered to each person to whom the prospectus is sent or given,
the latest quarterly report that is specifically incorporated by reference in
the prospectus to provide such interim financial information.

                                      II-3

                                   SIGNATURES


    Pursuant to the requirements of the Securities Act of 1933, as amended, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-3 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of New York, State of New York on March 30, 2001.



                                                      
                                                       JUNO ONLINE SERVICES, INC.

                                                       By:              /s/ CHARLES ARDAI
                                                            -----------------------------------------
                                                                          Charles Ardai
                                                              PRESIDENT, CHIEF EXECUTIVE OFFICER AND
                                                                             DIRECTOR



    Pursuant to the requirements of the Securities Act of 1933, as amended, this
Registration Statement has been signed by the following persons in the
capacities indicated on March 30, 2001.





                  SIGNATURE                                        TITLE
                  ---------                                        -----
                                            
              /s/ CHARLES ARDAI
- --------------------------------------------   President, Chief Executive Officer and
                Charles Ardai                    Director (principal executive officer)

                                               Senior Vice President and Corporate
            /s/ HARSHAN BHANGDIA                 Controller; Acting Chief Financial Officer
- --------------------------------------------     (principal financial and accounting
              Harshan Bhangdia                   officer)

         /s/ THOMAS L. PHILLIPS, JR.
- --------------------------------------------   Director
           Thomas L. Phillips, Jr.

             /s/ EDWARD J. RYEOM
- --------------------------------------------   Director
               Edward J. Ryeom

- --------------------------------------------
                Louis Salkind                  Director

              /s/ DAVID E. SHAW
- --------------------------------------------   Director and Chairman of the Board
                David E. Shaw



                                      II-4

                                 EXHIBIT INDEX




       EXHIBIT
         NO.                                    DESCRIPTION
- ---------------------   ------------------------------------------------------------
                     
         5.1            Opinion of Brobeck, Phleger & Harrison LLP*

        10.1            Common Stock Investment Agreement, dated as of October 6,
                        2000 between the Registrant and Westgate International L.P.*

        10.2            Registration Rights Agreement, dated October 6, 2000,
                        between the Registrant and Westgate International L.P.*

        10.3            Assignment and Assumption Agreement, dated November 20,
                        2000, by and between Westgate International, L.P. and The
                        Kingston Limited Partnership.*

        10.4            Amendment No. 1 to the Common Stock Investment Agreement and
                        the Registration Rights Agreement, dated as of March 29,
                        2001, by and between the Registrant and The Kingston Limited
                        Partnership.

        23.1            Consent of Brobeck, Phleger & Harrison LLP (included in the
                        opinion filed as Exhibit 5.1).

        23.2            Consent of PricewaterhouseCoopers LLP, independent
                        accountants.

        24.1            Power of Attorney.*



- ------------------------

* Previously filed.