I've got 78 live Pink floyd shows on CD. Other than that I've got some Dave Matthews, Grateful Dead, Primus, Oysterhead, Clutch, Widespread Panic, Phish, and a few others I can't really remember.
Some I got off of sites like:
http://www.pf-roio.de
http://www.furthermore.com
http://www.Primussucks.com
http://www.gdlive.com
though alot of the sites linked from these are dead and have been for a year or more.
Some I've traded for with people from these sites, a few I've bought from sites linked to these sites.