I was recently looking for a good Internet radio site.
I found Pandora
and thought it was really cool. It's free to sign up and it has some pretty darn good AI that lets you build a radio station "seeded" off of songs you like. I would say that so far I haven't yet heard a song I didn't like that it has picked for me.
Sorry, if this is olde news for most, but as I said I had just recently had this need