<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS RESTATED SUMMARY FINANCIAL INFORMATION EXTRACTED FROM 
THE RESPECTIVE BALANCE SHEET AS OF DEC-31-1997 MAR-31-1998 AND THE RELATED 
STATEMENT OF INCOME AND CASH FLOW FOR THE RESPECTIVE PERIOD THEN ENDED.
</LEGEND>
<RESTATED> 
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>
<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>                                          19,973                  20,402
<SECURITIES>                                         0                       0
<RECEIVABLES>                                    5,723                   5,991
<ALLOWANCES>                                       592                     592
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                                26,853                  27,460
<PP&E>                                           4,341                   4,700
<DEPRECIATION>                                   1,643                   1,803
<TOTAL-ASSETS>                                  39,670                  39,584
<CURRENT-LIABILITIES>                           12,250                  11,672
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                           159                     161
<OTHER-SE>                                      26,037                  26,397
<TOTAL-LIABILITY-AND-EQUITY>                    39,670                  39,584
<SALES>                                              0                       0
<TOTAL-REVENUES>                                31,439                  10,357
<CGS>                                                0                       0
<TOTAL-COSTS>                                    1,552                     583
<OTHER-EXPENSES>                                35,135                   7,737
<LOSS-PROVISION>                                   270                       0
<INTEREST-EXPENSE>                                  12                       1
<INCOME-PRETAX>                                  1,371                   2,325
<INCOME-TAX>                                       940                     923
<INCOME-CONTINUING>                                431                   1,402
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                       431                   1,402
<EPS-PRIMARY>                                     0.03                    0.09
<EPS-DILUTED>                                     0.03                    0.09
        


</TABLE>