From the Real Deal podcast, a few links for music files without copy-protection.
A couple of others. – CNET The Real Deal Forums

(Electromancer is now defunct and CommonTunes seems to have changed its vocation)

My favourite so far has been Calabash Music, which has an excellent selection of music from around the world and gives away free tracks every week.<—e7228deea7aa72ac1580066b0acda278—>