
<TABLE> <S> <C>

<PAGE>
 

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>                       <C>
<PERIOD-TYPE>                   YEAR                      YEAR
<FISCAL-YEAR-END>                         DEC-31-1997               DEC-31-1998
<PERIOD-START>                            JAN-01-1997               JAN-01-1998
<PERIOD-END>                              DEC-31-1997               DEC-31-1998
<CASH>                                         18,906                    23,548
<SECURITIES>                                        0                         0
<RECEIVABLES>                                  13,674                    14,534
<ALLOWANCES>                                    1,516                     2,127
<INVENTORY>                                         0                         0
<CURRENT-ASSETS>                               36,602                    40,928
<PP&E>                                         45,555                    46,403
<DEPRECIATION>                                  7,263                    14,202
<TOTAL-ASSETS>                                117,617                   132,887
<CURRENT-LIABILITIES>                          22,796                    24,934
<BONDS>                                             0                         0
<PREFERRED-MANDATORY>                               0                         0
<PREFERRED>                                         0                         0
<COMMON>                                            9                        72
<OTHER-SE>                                      7,413                    84,564
<TOTAL-LIABILITY-AND-EQUITY>                  117,617                   132,887
<SALES>                                        74,842                   132,926
<TOTAL-REVENUES>                               82,598                   144,232
<CGS>                                          34,620                    57,151
<TOTAL-COSTS>                                  80,283                   135,131
<OTHER-EXPENSES>                                    0                         0
<LOSS-PROVISION>                                    0                         0
<INTEREST-EXPENSE>                              3,108                     1,250
<INCOME-PRETAX>                                 (793)                     7,851
<INCOME-TAX>                                    (331)                     3,350
<INCOME-CONTINUING>                             (462)                     4,501
<DISCONTINUED>                                      0                         0
<EXTRAORDINARY>                                 (418)                         0
<CHANGES>                                           0                     (205)
<NET-INCOME>                                    (880)                     4,296
<EPS-PRIMARY>                                 (12.12)                      0.29
<EPS-DILUTED>                                 (12.12)                      0.27
        

</TABLE>
