This doesn't help-- send out yesterday prob why it tanked on the acquisition news.
XM Satellite Radio Holdings Inc. (Nasdaq: XMSR) announced today that XM Satellite Radio Inc. ("XM Radio"), its wholly-owned subsidiary, is launching an offering of $550 million aggregate principal amount of exchangeable senior subordinated notes due 2014 (the "Notes"). The Notes will be exchangeable into shares of SIRIUS Satellite Radio Inc. common stock.