Okay, I admit it, I like the Live Music section of the Internet Archive "a whole lot" and I have spent some time sampling groups and venues and then downloading the one's I'd like to listen to locally. This is supposed to be a place where everything is okay'd by the artists/record companies and everything is above board. The problem is the interface is clunky. There is an improved, faster interface now called DEWEY:
http://deweymusic.org/It lets you go through the large collection and stream things and easily download a whole archive of a given event. This stuff is mostly lesser known groups who are only famous locally, regionally, or maybe in their own minds!
Internet Archives Live Music Section:
http://www.archive.org/details/etree