<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM QUARTERLY
REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
FOR THE QUARTERLY PERIOD ENDED JUNE 30, 1999 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000
<CURRENCY> US DOLLARS

<S>                             <C>                     <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   3-MOS                   6-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998             DEC-31-1999             DEC-31-1998             DEC-31-1999
<PERIOD-START>                             APR-01-1998             APR-01-1999             JAN-01-1998             JAN-01-1999
<PERIOD-END>                               JUN-30-1998             JUN-30-1999             JUN-30-1998             JUN-30-1999
<EXCHANGE-RATE>                                      1                       1                       1                       1
<CASH>                                               0                 352,372                       0                       0
<SECURITIES>                                         0                       0                       0                       0
<RECEIVABLES>                                        0                   7,735                       0                       0
<ALLOWANCES>                                         0                     653                       0                       0
<INVENTORY>                                          0                   1,411                       0                       0
<CURRENT-ASSETS>                                     0                 368,899                       0                       0
<PP&E>                                               0                  80,614                       0                       0
<DEPRECIATION>                                       0                  33,164                       0                       0
<TOTAL-ASSETS>                                       0                 462,860                       0                       0
<CURRENT-LIABILITIES>                                0                  72,849                       0                       0
<BONDS>                                              0                       0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0                       0
<PREFERRED>                                          0                      47                       0                       0
<COMMON>                                             0                     321                       0                       0
<OTHER-SE>                                           0                 380,655                       0                       0
<TOTAL-LIABILITY-AND-EQUITY>                         0                 462,860                       0                       0
<SALES>                                              0                       0                       0                       0
<TOTAL-REVENUES>                                37,990                  78,001                  67,816                 146,244
<CGS>                                                0                       0                       0                       0
<TOTAL-COSTS>                                   17,675                  33,492                  31,798                  62,672
<OTHER-EXPENSES>                                32,137                  73,010                  53,780                 137,877
<LOSS-PROVISION>                                   591                     830                   1,687                   1,779
<INTEREST-EXPENSE>                                 621                     417                   1,308                     732
<INCOME-PRETAX>                               (12,017)                (24,547)                (18,421)                (46,790)
<INCOME-TAX>                                         0                       0                       0                       0
<INCOME-CONTINUING>                           (11,822)                (28,501)                (17,762)                (54,305)
<DISCONTINUED>                                       0                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
<CHANGES>                                            0                       0                       0                       0
<NET-INCOME>                                  (13,071)                (28,174)                (19,475)                (54,063)
<EPS-BASIC>                                     (0.53)                  (0.88)                  (0.82)                  (1.71)
<EPS-DILUTED>                                   (0.53)                  (0.88)                  (0.82)                  (1.71)


</TABLE>