																Three Months Ended March 31, 2009

	Year Ended December 31,
(in thousands)	2004			2005			2006			2007			2008
Earnings:
Loss before income taxes	$	(102,654	)	$	(143,164	)	$	(166,044	)	$	(159,997	)	$	(93,643	)	$	(19,217	)
Add: Fixed charges		1,855			1,818			1,881			1,833			7,399			1,933
Total Earnings	$	(100,799	)	$	(141,346	)	$	(164,163	)	$	(158,144	)	$	(86,244	)	$	(17,284	)
Fixed Charges
Interest expense	$	575		$	309		$	193		$	93		$	5,681		$	1,516
Estimated interest component of rent expense		1,280			1,509			1,688			1,740			1,718			417
Total fixed charges	$	1,855		$	1,818		$	1,881		$	1,833		$	7,399		$	1,933
Ratio of earnings to fixed charges		Note 1			Note 1			Note 1			Note 1			Note 1			Note 1

Note 1: Earnings for 2004, 2005, 2006, 2007, 2008 and the three months ended March 31, 2009 were insufficient to cover fixed charges by $102.7 million, $143.2 million, $166.0 million $160.0 million, $93.6 million and $19.2 million, respectively.