Pandora.com Free Music
 

It's a website that streams music that's similar to the bands you type in. I think it's a great idea to find bands that sound similar to the ones you currently like. Although it doesn't have the most obscure bands we all love, it does have a lot of good stuff.

*edit*
Great to see I'm on top of things on MB

Word. I've never seen it. Gonna go check it out now.