
<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFROMATION EXTRACTED FROM THE BALANCE
SHEET AND STATEMENT OF OPERATIONS FOUND ON PAGES 1 AND 2 OF THE COMPANY'S FORM
10-Q FOR THE YEAR-TO-DATE AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                     109,171,740
<SECURITIES>                                 4,999,091
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                           114,442,541
<PP&E>                                      30,430,647
<DEPRECIATION>                                 721,519
<TOTAL-ASSETS>                             144,151,669
<CURRENT-LIABILITIES>                       10,025,899
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                     1,000,451
<OTHER-SE>                                 133,125,319
<TOTAL-LIABILITY-AND-EQUITY>               144,151,669
<SALES>                                              0
<TOTAL-REVENUES>                                     0
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                            19,814,791
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                           1,086,117
<INCOME-PRETAX>                           (17,253,390)
<INCOME-TAX>                                       800
<INCOME-CONTINUING>                       (17,254,190)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                              (18,031,003)
<EPS-PRIMARY>                                   (0.19)
<EPS-DILUTED>                                   (0.19)
        

</TABLE>
