mp3panda.com is a site that distributes music in mp3 format. The main draw of the site is that tracks are $0.05 (yes, that is five cents). You pay in advance for $20 (I think) worth of downloads at a time, and then download the tracks whenever you want.
It is apparently legal - in Russia,
according to them 
Other articles claim it is legal everywhere, I seriously doubt that:
http://www.badbee.biz/mp3-panda-review.html http://answers.yahoo.com/question/in...0104249AArZVCb
I think it is similar to allofmp3.com, and there is a wikipedia entry here that has some discussion on their legal issues:
http://en.wikipedia.org/wiki/AllOfMP3