RadioTuna http://radiotuna.com

So many stations, but this site makes it easy to search them.

This site is the best place to listen to online radio that I've found on the web.

I like all kinds of music from Bluegrass and Jazz through to Pop and even Dubstep. There's a massive range of music on offer, and it's often stuff that I haven't found in other places. Usually it's really hard to find decent stations amongst all the 1000s out there but it seems much easier on this site. They've got these little bar graphs that tell you the kind of music played by each station so you know what each one is like without even listening to it.

Pros: It's easy to use and has a great selection of music to listen to - and it's all free!

Cons: It would be nice if you could get BBC stations through it, and I can't access it at work :o(