jag
it looks like imix only allows you to post your playlists, not your own actual recorded material. Could be wrong, but that's what it looks like at first glance
http://maccentral.macworld.com/news/2004/04/27/itunes/
http://www.apple.com/itunes/store/share.html
With CD Baby you can post actual content. You sign a distribution contract with them, which they will do with anyone, and pay a one time fee of $35 or some such, and they hold and mail CDs for you, and put you up on iTunes. The artist cut from iTunes is I think something like $.73 per download, of which CD Babay takes 6 cents or so, leaving you with a much higher cut than anywhere else.
Anyone still wanna rail against the injustice of the music industry?
-sm