Exhibit 99.1


AMERICA ONLINE TO ACQUIRE MAPQUEST.COM, INC.

Provides New  Advertising  and  E-Commerce  Opportunities  Targeted at the Local
Segment

Dulles,  VA and New York,  NY,  December 22, 1999 - America  Online,  Inc.,  the
world's leading  interactive  services company (NYSE: AOL), today announced that
it  will  acquire  MapQuest.com,   Inc.  (NASDAQ:  MQST),  a  proven  leader  in
destination  information  solutions,  in  an  all-stock  transaction  valued  at
approximately $1.1 billion.

The acquisition provides users of America Online's brands,  including members of
AOL and  CompuServe and visitors to Netcenter and ICQ, with  award-winning  maps
and directions and new ways to customize their  interactive  experience.  Adding
MapQuest.com to AOL's Digital City, the #1 local content network, and MovieFone,
the  nation's  #1  movie  listing  guide  and  ticketing  service,   offers  new
advertising and commerce  opportunities  built around mapping and directions for
entertainment, dining and shopping and further strengthens AOL's local presence.
The acquisition also advances the Company's "AOL Anywhere"  strategy,  providing
maps and directions on multiple devices.

MapQuest.com  leads the  rapidly-growing  online mapping segment in market share
and reach.  As the world's  leading  provider of maps on the Internet,  MapQuest
generates  the majority of all Internet  mapping  page views,  delivers  mapping
solutions to almost 1000 Web sites and is linked to by more than  170,000  sites
ranked among the top 50 Web properties  overall in the most recent Media Metrix,
with a reach of almost 6 percent.

Bob Pittman,  President and Chief Operating Officer, America Online, Inc., said:
"MapQuest.com offers terrific interactive service that consumers love. They have
built a strong brand that is recognized as the place to turn for online maps and
directions.  With MapQuest integrated across our brands, we'll offer AOL members
and visitors to our Web properties the best mapping service  available  anywhere
and  provide  our  partners  with a whole  new  range of  targeted  content  and
advertising opportunities."

Continued Pittman: "Like calendaring, maps are a great example of a product that
is easier to use and more useful online than offline.  With AOL's  resources and
infrastructure  behind  MapQuest,  we can accelerate the distribution of maps on
smart-phones, PalmPilots and other non-PC devices. This additional presence will
advance our 'AOL Anywhere'  strategy,  making it more convenient for our members
to get the directions they need, wherever they are."

A recent study by Jupiter Communications found that more than seventy percent of
consumers view online maps as more valuable than printed versions.  Ted Leonsis,
President of AOL's  Interactive  Properties  Group,  said:  "Customized maps are
emerging  as a killer  application  in the

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local  segment,  which is one of the fastest  growing areas on the Internet.  By
threading MapQuest across our family of brands, we'll be able to provide mapping
and directions, including real-time traffic updates, to millions of more people,
offering a comprehensive local package that incorporates  directions,  shopping,
dining,  movies and other  entertainment  options.  Eighty  percent of purchases
occur 20 minutes from home and MapQuest will give us additional strength in this
critical local market,  with maps and directions  driving new increases in local
commerce.

In a study released earlier this week, Jupiter estimates that local and regional
advertising  will account for 24% of all Internet  advertising by the year 2003,
from 14% in 1999.

Michael Mulligan,  Chairman and CEO, MapQuest.com,  said, "We're very pleased to
join with AOL. We have been helping millions of people get where they need to go
each day.  With  America  Online's  resources  and  unmatched  understanding  of
consumers,  we can add new services and reach more people, becoming an even more
important part of people's daily lives."

MapQuest.com also has a strong and growing international presence, with coverage
of 78 countries in five languages.

Shareholders of MapQuest.com will receive 0.31558 shares of AOL common stock for
each  share  of  MapQuest  stock.  The  stock-for-stock,  pooling  of  interests
transaction  is  expected  to close in the  spring of 2000,  subject  to various
conditions   including  customary  regulatory  approvals  and  the  approval  of
MapQuest.com shareholders.

About America Online, Inc.

Founded in 1985, America Online, Inc., based in Dulles, Virginia, is the world's
leader  in  interactive  services,  Web  brands,   Internet  technologies,   and
e-commerce  services.  America Online,  Inc.  operates:  two worldwide  Internet
services,  America Online,  with more than 20 million  members,  and CompuServe,
with more than 2.2 million  members;  several leading  Internet brands including
ICQ, AOL Instant  Messenger and Digital City,  Inc.; the Netscape  Netcenter and
AOL.COM  portals;  the  Netscape  Navigator  and  Communicator   browsers;   AOL
MovieFone,  the  nation's #1 movie  listing  guide and  ticketing  service;  and
Spinner  Networks and NullSoft,  Inc.,  leaders in Internet  music.  Through its
strategic  alliance  with Sun  Microsystems,  the  Company  develops  and offers
easy-to-deploy,  end-to-end  e-commerce and  enterprise  solutions for companies
operating in the Net Economy.

About MapQuest.com, Inc.

MapQuest.com,  Inc. is a leader in online destination information solutions. The
Company launched its popular web site  (www.MapQuest.com)  in 1996. According to
October Media Metrix,  MapQuest.com receives 3.7 million unique visitors monthly
to its consumer web site. MapQuest.com also licenses its technology to more than
950 business partners.  Through these licensing  agreements,  MapQuest.com helps
businesses  integrate maps and driving directions into their Internet,  Intranet
and call  center  applications  for  improved  marketing  and  customer  service
functions.  In addition  to  web-enabled  mapping  services,  MapQuest.com  also
provides  high-quality maps and geographic content in digital form for a variety
of industries including publishing,  travel,  hotels, real estate and retailers.
MapQuest.com is listed on the NASDAQ; the ticker symbol is MQST.

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