<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<RESTATED>

<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   6-MOS                   3-MOS                   OTHER
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996             DEC-31-1995
<PERIOD-START>                             JAN-01-1996             APR-01-1996             JUN-15-1995
<PERIOD-END>                               JUN-30-1996             JUN-30-1996             DEC-31-1995
<CASH>                                      85,957,967              85,957,967                 711,620
<SECURITIES>                                         0                       0               2,561,854
<RECEIVABLES>                                        0                       0                       0
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                            85,464,079              85,464,079               3,324,973
<PP&E>                                         452,260                 452,260                  66,244
<DEPRECIATION>                                (28,752)                (28,752)                 (1,781)
<TOTAL-ASSETS>                              82,210,996              86,210,996               3,389,436
<CURRENT-LIABILITIES>                        1,214,045               1,214,045                 175,759
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                   4,025
<COMMON>                                   103,197,767             103,197,767               6,009,135
<OTHER-SE>                                (18,200,816)            (18,200,816)             (2,799,483)
<TOTAL-LIABILITY-AND-EQUITY>                86,210,996              86,210,996               3,389,436
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                                     0                       0                       0
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                        0                       0                       0
<OTHER-EXPENSES>                             7,737,189               4,024,539               1,044,000
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                                   0                       0                       0
<INCOME-PRETAX>                            (6,845,132)             (3,170,920)               (997,000)
<INCOME-TAX>                                         0                       0                       0
<INCOME-CONTINUING>                        (6,845,132)             (3,170,920)               (997,000)
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                               (6,845,132)             (3,170,920)               (997,000)
<EPS-PRIMARY>                                   (1.04)                  (0.31)                  (0.36)
<EPS-DILUTED>                                   (1.04)                  (0.31)                  (0.36)


</TABLE>