<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S QUARTERLY REPORT ON FORM 10Q FOR THE THREE-MONTHS ENDED MARCH 31, 2000
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               MAR-31-2000
<CASH>                                         191,750
<SECURITIES>                                   155,498
<RECEIVABLES>                                    4,506
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                               353,751
<PP&E>                                          61,405
<DEPRECIATION>                                  36,195
<TOTAL-ASSETS>                                 396,931
<CURRENT-LIABILITIES>                           16,039
<BONDS>                                        179,155
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           262
<OTHER-SE>                                     201,475
<TOTAL-LIABILITY-AND-EQUITY>                   396,931
<SALES>                                          2,619
<TOTAL-REVENUES>                                 7,523
<CGS>                                                0
<TOTAL-COSTS>                                   26,084
<OTHER-EXPENSES>                                  (19)
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 860
<INCOME-PRETAX>                               (16,159)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (16,159)
<EPS-BASIC>                                     (0.62)
<EPS-DILUTED>                                        0