Xihilisk

UK artist Xihilisk has released everything he's done via BitTorrent for free. As this TorrentFreak article states, he's not the only one to ever have done this (hell, I've been giving my stuff away online since the late 90s). It's an interesting article that deals with some of his reasons for giving away the music:

I knew that quite a few people were already doing this, but its still the most exciting and effective way for me to get my music to people who never would have found it otherwise.