Music discussion? General or for a specific band? I know there's some general music discussion groups on cafemom... probably
also, if you like specific bands, check their official website, sometimes they have bulletin boards there. (I know LOTS of metal bands do.)
You can also type "(band name) forum" in google and see what you get.
MTV and VH1 probably have music discussion boards too, I would assume they would.
at 10:55 AM on Jan. 22, 2010