Exhibit 12.1

COMPUTATION OF

RATIO OF EARNINGS TO FIXED CHARGES

	Year Ended December 31,
(amounts in thousands)	2003			2002			2001			2000		1999
(Loss) income before income taxes, extraordinary loss and cumulative effect of a change in accounting principle	$	(37,446	)	$	(95,890	)	$	(105,062	)	$	62,353	$	22,522
Equity in net losses of equity method investees		1,933			3,405			1,962			385		—
(Loss) income before equity in net losses of equity method investees, income taxes, extraordinary loss and cumulative effect of a change in accounting principle		(35,513	)		(92,485	)		(103,100	)		62,738		22,522
Plus fixed charges:
Interest expense		6,945			7,254			17,966			6,384		35
Amortization of costs related to indebtedness		1,171			1,095			2,647			1,088		—
Estimated interest factor in rent expense (1)		443			576			734			428		345
Total Fixed Charges		8,559			8,925			21,347			7,900		380
Adjusted (loss) income		(26,954	)		(83,560	)		(81,753	)		70,638		22,902
Fixed charges		8,559			8,925			21,347			7,900		380
Deficiency in earnings to cover fixed charges	$	(35,513	)	$	(92,485	)	$	(103,100	)	$	—	$	—
Ratio of earnings to fixed charges		*			*			*			8.9		60.3

 * Calculation not meaningful as ratio is less then 1.

(1) The interest factor in rent expense is estimated as one-third of rental expense.