Have you checked out Pandora Internet Radio? It's totally free and is always playing at our house! I love how you get to pick an artist and then not only get to listen to your favorite songs, but get to exposed to similar songs and bands. You don't have to have an iPhone, not sure why I thought this! Check it out HERE!
Wanna know what's on my Pandora list? Hillsong, David Crowder, Michael Buble, and John Mayer. :)