AGREEMENT OF JOINT FILING

                                                                      EXHIBIT A


                            AGREEMENT OF JOINT FILING

         In accordance with Rule 13d-1(k) under the Securities Exchange Act of
1934, as amended, the undersigned hereby agree to the joint filing on behalf of
each of them of a Statement on Schedule 13G, and any amendments thereto, with
respect to the Class A Common Stock, par value $0.01 per share, of
0-000-XXXXXXX.XXX, Inc. and that such agreement be included as an exhibit to
such filing.

         This Agreement may be executed in any number of counterparts, each of
which shall be deemed to be an original and all of which together shall be
deemed to constitute one and the same instrument.

         IN WITNESS WHEREOF, each of the undersigned has executed this agreement
as of February 13, 2003.

                                       SOFTBANK CAPITAL PARTNERS LP
                                       By: SOFTBANK CAPITAL PARTNERS LLC,
                                           its General Partner


                                       By:  /s/ Xxxxxx X. Xxxxxx
                                           ------------------------------------
                                           Name:   Xxxxxx X. Xxxxxx
                                           Title:  Managing Member


                                       SOFTBANK CAPITAL LP
                                       By:  SOFTBANK CAPITAL PARTNERS LLC,
                                            its General Partner


                                       By:  /s/ Xxxxxx X. Xxxxxx
                                           ------------------------------------
                                           Name:   Xxxxxx X. Xxxxxx
                                           Title:  Managing Member


                                       SOFTBANK CAPITAL PARTNERS LLC


                                       By:  /s/ Xxxxxx X. Xxxxxx
                                           ------------------------------------
                                           Name:   Xxxxxx X. Xxxxxx
                                           Title:  Managing Member



                                      A-1



                                       SOFTBANK CAPITAL MANAGERS LLC


                                       By:  /s/ Xxxxxx X. Xxxxxx
                                           ------------------------------------
                                           Name:   Xxxxxx X. Xxxxxx
                                           Title:  Manager and Investment
                                                   Manager


                                       SOFTBANK CAPITAL PARTNERS INVESTMENT INC.


                                       By:  /s/ Xxxxxx X. Xxxxxx
                                           ------------------------------------
                                           Name:   Xxxxxx X. Xxxxxx
                                           Title:  Managing Member


                                       XXXXXXX X. XXX

                                        /s/ Xxxxxxx X. Xxx
                                       ----------------------------------------


                                       XXXXXX X. XXXXXX

                                        /s/ Xxxxxx X. Xxxxxx
                                       ----------------------------------------


                                       SOFTBANK HOLDINGS INC.


                                       By:  /s/ Xxxxxxx X. Xxxxxx, XX
                                           ------------------------------------
                                           Name:   Xxxxxxx X. Xxxxxx, XX
                                           Title:  Vice President


                                       SOFTBANK CORP.


                                       By:  /s/ Xxxxxx X. Xxxxxx
                                           ------------------------------------
                                           Name:   Xxxxxx X. Xxxxxx
                                           Title:  Attorney-in-fact


                                      A-2



                                       XXXXXXXXX XXX


                                       By:  /s/ Xxxxxx X. Xxxxxx
                                           ------------------------------------
                                           Name:   Xxxxxx X. Xxxxxx
                                           Title:  Attorney-in-fact






                                       A-3