
<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                     133,289,933
<SECURITIES>                                         0
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                           133,746,381
<PP&E>                                      17,823,872
<DEPRECIATION>                             (1,253,601)
<TOTAL-ASSETS>                             150,316,652
<CURRENT-LIABILITIES>                        8,387,295
<BONDS>                                              0
<PREFERRED-MANDATORY>                           12,138
<PREFERRED>                                          0
<COMMON>                                       988,313
<OTHER-SE>                                 140,928,906
<TOTAL-LIABILITY-AND-EQUITY>               150,316,652
<SALES>                                              0
<TOTAL-REVENUES>                             1,943,493
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                            10,748,292
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                           1,035,316
<INCOME-PRETAX>                            (9,840,115)
<INCOME-TAX>                                       800
<INCOME-CONTINUING>                        (9,840,915)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               (9,840,915)
<EPS-PRIMARY>                                      .11
<EPS-DILUTED>                                      .11
        

</TABLE>
