EX-99.1

                                                            Exhibit 99.1

Footnotes:

(1)  The stockholders are Warburg, Pincus Ventures, L.P., a Delaware limited
     partnership ("WPV"), and Warburg Pincus & Co., a New York general
     partnership ("WP"). The sole general partner of WPV is Warburg Pincus
     Partners LLC, a New York limited liability company ("WPP"), whose managing
     member is WP. Warburg Pincus LLC, a New York limited liability company ("WP
     LLC" and together with WPV, WPP and WP, the "Warburg Pincus Entities"),
     manages WPV. Charles R. Kaye and Joseph P. Landy are Managing General
     Partners of WP and Managing Members of WP LLC and may be deemed to control
     the Warburg Pincus Entities. Messrs. Kaye and Landy disclaim beneficial
     ownership of all shares held by the Warburg Pincus Entities. Kewsong Lee, a
     director of Knoll, Inc., is a general partner of WP and a managing director
     and member of WP LLC. All shares indicated as owned by Mr. Lee are included
     because of his affiliation with the Warburg Pincus Entities. By reason of
     such affiliation, Mr. Lee may be deemed to have an indirect pecuniary
     interest within the meaning of Rule 16a-1 of the Securities Exchange Act of
     1934, as amended (the "Exchange Act"), in an indeterminate portion of the
     shares reported herein. Mr. Lee disclaims "beneficial ownership" of such
     shares within the meaning of Rule 13d-3 under the Exchange Act.

(2)  Pro rata distribution from Warburg Pincus Ventures, L.P. to its limited
     partners.

EX-24

                                                                      Exhibit 24

                               POWER OF ATTORNEY

     The Undersigned hereby constitutes and appoints each of Scott A. Arenare,
Timothy J. Curt and Steven G. Schneider, acting together or individually,
his/her true and lawful attorney-in-fact to:

(1)  execute for and on behalf of the undersigned Forms 3, 4 and 5, together
     with any amendments thereto, in accordance with the Securities Exchange Act
     of 1934, as amended, and the rules thereunder;

(2)  do and perform any and all acts for and on behalf of the undersigned which
     may be necessary or desirable to complete the execution of any such Forms
     and the filing thereof with the United States Securities and Exchange
     Commission and any other person as may be required by law; and

(3)  take another action of any type whatsoever in connection with the foregoing
     which, in the opinion of such attorney-in-fact, may be of benefit to, in
     the best interest of, or legally required by, the undersigned, it being
     understood that the documents executed by such attorney-in-fact on behalf
     of the undersigned pursuant to this power of attorney shall be in such form
     and shall contain such terms and conditions as such attorney-in-fact may
     approve in his discretion.

     The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform all and every act and thing whatsoever requisite,
necessary and proper to be done in the exercise of any of the rights and powers
herein granted, with full power of substitution or revocation, hereby ratifying
and confirming all that such attorney-in-fact, or his substitute or substitutes,
shall lawfully do or cause to be done by virtue of this power or attorney and
the rights and powers granted. The undersigned acknowledges that the foregoing
attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming any of the undersigned's responsibilities to
comply with the Securities Exchange Act of 1934, as amended.

     The power of attorney shall continue in full force and effect until revoked
in writing by the undersigned or his/her attorney-in-fact.

     IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
this 15th day of May, 2004.

                           Signature:    /s/ Kewsong Lee
                                        ----------------------------------------
                                        Print Name: Kewsong Lee