I've recently gone through and updated it, just about doubling the number of bands represented. Give it a listen! It's, uh... eclectic.
Incidentally, anyone got a suggestion for a simple Flash-based MP3 player that I could embed on the webcast archives page? I need one that allows seeking in the stream. I just tried out five or six different ones, and none of them were able to seek properly on my URLs. (Seeking works fine in iTunes, so it's a player problem, not a server problem.)