I just uploaded a bunch of Live music to Project Opus. I can't wait to mix this in to the already incredible music up on Opus. I know David has been uploading lots of Live stuff as well. If you want to import some live music, follow the Music Import Tool - Screencast. You may also want to check out the all the great Live concerts from Archive.org.

Check it out....
http://www.projectopus.com/user/83/music/playlists