To add insult to injury, Sony/BMG's CD anticopying rootkit infringes on the GPL. Specifically, the software incorporates portions of LAME - the open source MP3 encoder that is licensed under the LGPL (known as the lesser or colloquially as the library GPL.)

I've always thought there was interesting tension between copyright owners in software and copyright owners in "content." I certainly hope that the software copyright holders sue for maximum statutory damages here.