They forgot Bleep.com (Score 1)

http://www.bleep.com/ It's a music service by warprecords.com. Plain mp3 files, ripped with LAME and no DRM. Their music store was nominated for a webby in 2004. I've purchased an album from them and was very happy with the audio quality. They have quite a backlog of out of print music available for purchase. I don't remember if they come with covers or if I put a cover on them.