Try this!

Kinda sucks, since it only shows well known acts it doesn't really help me... Nice idea though and working fairly well when you type in Exodus or something like that
 
I like Isis, so it said listen to Earth Crisis. No, I don't like Earth Crisis.

Whoa Ulver brings up a shitload of bands.

Searching for The Melvins reminds me I still need to check out the Secret Chiefs.

Donna Summer brought up Barbara Streisand. Fuck that.