<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
consolidated balance sheets, statements of operations and statements of cash
flows included in the Company's Form 10-Q for the period ended September 30, 
1998, and is qualified in its entirety by reference to such financial statements
and notes thereto.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                          35,446
<SECURITIES>                                    40,249
<RECEIVABLES>                                    3,206
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                83,498
<PP&E>                                          47,260
<DEPRECIATION>                                (25,461)
<TOTAL-ASSETS>                                 113,047
<CURRENT-LIABILITIES>                           25,275
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        30,146
<OTHER-SE>                                      66,362
<TOTAL-LIABILITY-AND-EQUITY>                   113,047
<SALES>                                              0
<TOTAL-REVENUES>                                31,805
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                                57,077
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               1,687
<INCOME-PRETAX>                              (149,878)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                          (149,878)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 (149,878)
<EPS-PRIMARY>                                   (5.06)
<EPS-DILUTED>                                   (5.06)