This place is pretty good it's a 'self adapting system' that basically asks you what bands (or movies or books) you like and you give them 3 (similar works best) favourites. It'll pop up with bands and you tell them if you like the band or not. basically over time it'll get better and better at telling what most people will like according to the groups that they already like.
try it out. lots of indi bands on there.
Dude I was fine before you tried to turn me into a cake - me after ralphing after being antiqued