JOINT FILING AGREEMENT

   1

                                                                   EXHIBIT 99.30

                             JOINT FILING AGREEMENT

     The undersigned hereby agree to the joint filing of the Schedule 13D to
which this Agreement is attached.

Dated: May 28, 1999

                                    AMPHION VENTURES L.P.

                                    By: Amphion Partners L.L.C., General Partner


                                    By: /s/ Xxxxxxx X.X. Xxxxxx
                                        ----------------------------------------
                                        Xxxxxxx X.X. Xxxxxx, a Managing Member


                                    AMPHION PARTNERS L.L.C.



                                    By: /s/ Xxxxxxx X.X. Xxxxxx
                                        ----------------------------------------
                                        Xxxxxxx X.X. Xxxxxx, a Managing Member


                                    ANTIOPE PARTNERS L.L.C.


                                    By: /s/ Xxxxxxx X.X. Xxxxxx
                                        ----------------------------------------
                                        Xxxxxxx X.X. Xxxxxx, a Managing Member


                                    AMPHION INVESTMENTS L.L.C.


                                    By: /s/ Xxxxxxx X.X. Xxxxxx
                                        ----------------------------------------
                                        Xxxxxxx X.X. Xxxxxx, a Managing Member