Holy crap, this is great! I've only been messing with it for a little bit, but it might be up there with Pandora. It's just a bunch of recorded concerts. You can even pick what songs from the concerts you want to hear. It just came out, so I don't know much more about it, but it's FREE and so far it's frickin awesome. http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=294355484&mt=8 I'm blasting an old The Who concert from 1973 right now and it sounds amazing. There's no search in the app yet, but hopefully that will change.