Discovered this a week ago and been in love with it since. It's a streaming music station, but the songs it plays are personalised to your tastes.
I downloaded the last.fm player off the site, did a similar artist search for lamb of god and it returned me a station that played songs from similar artists. And unlike conventional streaming radio stations, you can skip a song that is currently playing if you don't like it or even ban it, which stops it from ever being played again.
In the past week I have discovered great bands like Cult of Luna, Isis and Fantomas; bands I would have never discovered on my own. Hell I love it so much that nowadays I rather listen to it then download porn at home, and that's not something I say about many things.
So if you are someone who is always looking for new bands or music to listen to, do yourself a favor and check this out. You will thank me for it!