<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   YEAR                   YEAR                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1996             DEC-31-1995
<PERIOD-START>                             JAN-01-1997             JAN-01-1996             JAN-01-1995
<PERIOD-END>                               DEC-31-1997             DEC-31-1996             DEC-31-1995
<CASH>                                          16,450                   3,993                       0
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                    2,685                   2,506                       0
<ALLOWANCES>                                       165                     781                       0
<INVENTORY>                                        413                     499                       0
<CURRENT-ASSETS>                                22,082                   9,073                       0
<PP&E>                                          36,166                  21,637                       0
<DEPRECIATION>                                  12,768                   4,236                       0
<TOTAL-ASSETS>                                  46,887                  27,119                       0
<CURRENT-LIABILITIES>                           32,594                  28,279                       0
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                  14,013                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                           112                      60                       0
<OTHER-SE>                                    (21,321)                   5,963                       0
<TOTAL-LIABILITY-AND-EQUITY>                    46,887                  27,119                       0
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                                79,174                  32,503                   3,028
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                   41,375                  21,161                   1,404
<OTHER-EXPENSES>                                66,253                  41,600                   7,642
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                               2,099                   1,041                     136
<INCOME-PRETAX>                               (29,916)                (31,149)                 (6,120)
<INCOME-TAX>                                         0                       0                       0
<INCOME-CONTINUING>                           (29,916)                (31,149)                 (6,120)
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                  (29,916)                (31,149)                 (6,120)
<EPS-PRIMARY>                                   (2.99)                  (5.13)                  (1.59)
<EPS-DILUTED>                                   (2.99)                  (5.13)                  (1.59)
        

</TABLE>