Pandora Streaming Music Radio
I've started listening to Pandora streaming music. You enter what bands or songs you like and it finds musically similar songs/bands. This is supposed to be the most sophisticated music service recommendation service out there.
I think it does a pretty good job, especially finding similar music from bands I've never heard of previously. The paid version is $3/month and the free version I use has ads. The reason why I probably won't continue to use it is I have to click on that tab whenever it switches songs, probably because it wants to make sure I'm looking at ads. This is annoying but I can't really blame them, I can't see how they make enough money to pay for all this.