<ARTICLE> 5
       
                                                  
<PERIOD-TYPE>                   YEAR                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1998
<PERIOD-START>                             JAN-01-1997             JAN-01-1998
<PERIOD-END>                               DEC-31-1997             MAR-31-1998
<CASH>                                      10,282,000              16,531,000
<SECURITIES>                                12,438,000               2,535,000
<RECEIVABLES>                                4,266,000               3,253,000
<ALLOWANCES>                                   604,000                 630,000
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                            27,858,000              23,533,000
<PP&E>                                       7,438,000               7,025,000
<DEPRECIATION>                               3,682,000               4,513,000
<TOTAL-ASSETS>                              37,427,000              32,800,000
<CURRENT-LIABILITIES>                       13,682,000              14,290,000
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                       69,785,000              72,240,000
<PREFERRED>                                          0                       0
<COMMON>                                     2,310,000               2,390,000
<OTHER-SE>                                  (4,353,000)             (3,723,000)
<TOTAL-LIABILITY-AND-EQUITY>                37,427,000              32,800,000
<SALES>                                     17,993,000               5,106,000
<TOTAL-REVENUES>                            17,993,000               5,106,000
<CGS>                                        7,398,000               2,527,000
<TOTAL-COSTS>                               40,528,000               9,189,000
<OTHER-EXPENSES>                                     0                       0
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                            (277,000)               (110,000)
<INCOME-PRETAX>                            (29,111,000)             (6,395,000)
<INCOME-TAX>                                         0                       0
<INCOME-CONTINUING>                                  0                       0
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                               (29,111,000)             (6,395,000)
<EPS-PRIMARY>                                    (6.38)                  (1.16)
<EPS-DILUTED>                                    (6.38)                  (1.16)