So my brother and one of my sisters have an iPhone... On it they have this radio program called Pandora. You type in the name of an artist or song you like, and it plays that and similar music. Unlike a lot of radio stations, though, this one actually does a good job at it. Later I found out about a website that runs it:
http://www.pandora.com/
I dunno if anyone else here has heard of it, but I personally love it. Lemme know what ya think.