As an update to this, they were "bailed out" by Liberty Media Corp. just recently. Should save them from bankruptcy for another few years. Now, they need to worry about getting delisted from the NASDAQ. In order to avoid that, they will need to get their share price above $1. No easy task when they are currently sitting at $.16.
They also recently reported "pro forma" numbers for 2007 (they are reporting post-merger subs and income numbers as if they were pre and post-merger) that were better than forecast. It's very exciting to see where this company goes from here. Mr. Karmazin definitely needs to change the company's focus to better hardware, better customer service, and PR issues (when's the last time you saw a commercial for SatRad?)
You can listen to the conference call concerning their most recent SEC filing (if you're interested) today the 12th at 0800 ET at http://investor.sirius.com or on Sirius Channel 126 or XM Channel 90.
As a disclaimer, I do own stock in SiriusXM.