<Page>
EXHIBIT 3.28
ARTICLES OF ORGANIZATION
OF
NHW AUBURN, LLC
UNDER SECTION 203 OF THE LIMITED LIABILITY COMPANY LAW
FIRST: The name of the limited liability company is NHW Auburn, LLC.
SECOND: The county within this state in which the office of the limited
liability company is to be located is Onondaga County.
THIRD: The secretary of state is designated as agent of the limited
liability company upon whom process against it may be served. The post office
address within or without this state to which the secretary of state shall mail
a copy of any process against the limited liability company served upon him or
her is One Websters Landing, Syracuse, New York 13202.
FOURTH: The limited liability company is to be managed by (check
appropriate box):
/X/ 1 or more members
/ / A class or classes of members
/ / 1 or more managers
/ / A class or classes of managers
IN WITNESS WHEREOF, this certificate has been subscribed this 25th day of
March, 1996, by the undersigned who affirms that the statements made herein are
true under the penalties of perjury.
/s/ Colleen Parks Andriano
-------------------------------------
Colleen Parks Andriano, Organizer
<Page>
ARTICLES OF ORGANIZATION
OF
NHW AUBURN, LLC
UNDER SECTION 203 THE LIMITED LIABILITY COMPANY LAW
[STAMP]
BOND, SCHOENECK & KING, LLP
ATTRONEYS AT LAW
111 WASHINGTON STREET
ALBANY, NEW YORK
12210-2211