Exhibit 12.1



Computation of Ratio of Earnings to Fixed Charges and Ratio of Earnings to Combined

Fixed Charges and Preferred Stock Dividend Requirements

(in thousands, except for ratios)



Ratio of Earnings to Fixed Charges



|                                                                             |  |                         |         |   |      |   |         |      |  |   |         |   |      |   |         |  |   |         |  
|---------------------------------------------------------------------------- |  | ----------------------- | ------- | - | ---- | - | ------- | ---- |  | - | ------- | - | ---- | - | ------- |  | - | ------- | -
|                                                                             |  | Year Ended December 31, |        
|                                                                             |  | 2003                    |         |   | 2002 |   |         | 2001 |  |   | 2000    |   | 1999 |  
|Income (loss) before income taxes and cumulative effect of accounting change |  | $                       | (81,038 | ) |      | $ | (45,235 | )    |  | $ | (34,185 | ) |      | $ | 239,583 |  | $ | (11,994 | )
|Add: Fixed charges                                                           |  |                         | 10,743  |   |      |   | 6,576   |      |  |   | 4,450   |   |      |   | 1,386   |  |   | 1,674   |  
|Less: Capitalized interest                                                   |  |                         | (832    | ) |      |   | (765    | )    |  |   |        |   |      |   |        |  |   |        |  
|                                                                             |  |                         |         |   |      |   |         |      |  |   |         |   |      |   |         |  |   |         |  
|Earnings, as defined                                                         |  | $                       | (71,127 | ) |      | $ | (39,424 | )    |  | $ | (29,735 | ) |      | $ | 240,969 |  | $ | (10,320 | )
|                                                                             |  |                         |         |   |      |   |         |      |  |   |         |   |      |   |         |  |   |         |  
|Interest expense                                                             |  | $                       | 5,360   |   |      | $ | 1,011   |      |  | $ | 500     |   |      | $ | 386     |  | $ | 824     |  
|Capitalized interest                                                         |  |                         | 832     |   |      |   | 765     |      |  |   |        |   |      |   |        |  |   |        |  
|Estimated interest portion of rental expense                                 |  |                         | 4,551   |   |      |   | 4,800   |      |  |   | 3,950   |   |      |   | 1,000   |  |   | 850     |  
|                                                                             |  |                         |         |   |      |   |         |      |  |   |         |   |      |   |         |  |   |         |  
|Fixed charges                                                                |  | $                       | 10,743  |   |      | $ | 6,576   |      |  | $ | 4,450   |   |      | $ | 1,386   |  | $ | 1,674   |  
|                                                                             |  |                         |         |   |      |   |         |      |  |   |         |   |      |   |         |  |   |         |  
|Excess (deficiency) of earnings to fixed charges                             |  | $                       | (81,870 | ) |      | $ | (46,000 | )    |  | $ | (34,185 | ) |      | $ | 239,583 |  | $ | (11,994 | )
|                                                                             |  |                         |         |   |      |   |         |      |  |   |         |   |      |   |         |  |   |         |  
|Ratio of Earnings to Fixed Charges                                           |  |                         | N/A     |   |      |   | N/A     |      |  |   | N/A     |   |      |   | 173.9   |  |   | N/A     |  



Ratio of Earnings to Combined Fixed
Charges and Preferred Stock Dividend Requirements



|                                                                                                    |  |                         |         |    |      |   |         |      |  |   |         |   |      |   |         |  |   |         |  
|--------------------------------------------------------------------------------------------------- |  | ----------------------- | ------- | -- | ---- | - | ------- | ---- |  | - | ------- | - | ---- | - | ------- |  | - | ------- | -
|                                                                                                    |  | Year Ended December 31, |        
|                                                                                                    |  | 2003                    |         |    | 2002 |   |         | 2001 |  |   | 2000    |   | 1999 |  
|Earnings, as defined (from above)                                                                   |  | $                       | (71,127 | )  |      | $ | (39,424 | )    |  | $ | (29,735 | ) |      | $ | 240,969 |  | $ | (10,320 | )
|Preferred stock dividend requirements                                                               |  |                         | 230     |    |      |   | 702     |      |  |   | 785     |   |      |   | 756     |  |   | 392     |  
|                                                                                                    |  |                         |         |    |      |   |         |      |  |   |         |   |      |   |         |  |   |         |  
|Earnings, as defined                                                                                |  | $                       | (70,897 | )$ |      |   | (38,722 | )    |  | $ | (28,950 | ) |      | $ | 241,725 |  | $ | (9,928  | )
|                                                                                                    |  |                         |         |    |      |   |         |      |  |   |         |   |      |   |         |  |   |         |  
|Fixed charges (from above)                                                                          |  | $                       | 10,743  |    |      | $ | 6,576   |      |  | $ | 4,450   |   |      | $ | 1,386   |  | $ | 1,674   |  
|Preferred stock dividend requirements                                                               |  |                         | 230     |    |      |   | 702     |      |  |   | 785     |   |      |   | 756     |  |   | 392     |  
|                                                                                                    |  |                         |         |    |      |   |         |      |  |   |         |   |      |   |         |  |   |         |  
|Combined fixed charges and preferred stock dividend requirements                                    |  | $                       | 10,973  |    |      | $ | 7,278   |      |  | $ | 5,235   |   |      | $ | 2,142   |  | $ | 2,066   |  
|                                                                                                    |  |                         |         |    |      |   |         |      |  |   |         |   |      |   |         |  |   |         |  
|Excess (deficiency) of earnings to combined fixed charges and preferred stock dividend requirements |  | $                       | (81,870 | )  |      | $ | (46,000 | )    |  | $ | (34,185 | ) |      | $ | 239,583 |  | $ | (11,994 | )
|                                                                                                    |  |                         |         |    |      |   |         |      |  |   |         |   |      |   |         |  |   |         |  
|Ratio of earnings to combined fixed charges and preferred stock dividend requirements               |  |                         | N/A     |    |      |   | N/A     |      |  |   | N/A     |   |      |   | 100.2   |  |   | N/A     |  



For the purpose of
calculating the ratio of earnings to fixed charges, earnings are defined as consolidated income from continuing operations before income taxes plus fixed charges. Fixed charges are the sum of interest of all indebtedness, and estimated interest
within rental expense. We have no amortization of debt issuance costs or preference securities. The ratio of earnings to combined fixed charges and preferred stock dividend requirements includes the tax adjusted deemed dividend to preferred
stockholders.