In case anybody's at all interested in a cappella music, I've been recording this kind of stuff for a couple years now, doing all the voices, and posting it on youtube. I've got things like Ain't No Sunshine, The Scientist, ranging to classical choir music. I'm also nearly finished with a few new songs, so have a look again in a week or so.

Check it out: http://www.youtube.com/user/Badasscommy