Ever been to
pandora.com? Give the lady a try. She won't bite. What is it? An extension of someting called the Music Genome Project. It's an experimental internet radio station which attempts to expose you to a good mix of contemporary and obscure music that you actually like to here.
For risk of sounding like an ad, just check it out yourself.
My first station input was "foo fighters" and I really like what it's been playing since. There's a phase, about 4 or 5 songs in, where it starts to get a little wild and odd. Just make sure to tell it if you don't like what it's playing and you'll be groovin again by song 7 or 8.
Since it's late at night, and I've got some homework to work on still, I think I'll try putting in "Jack Johnson" and seeing what it plays me.