Have you tried http://www.songkick.com, also a YC startup? They are now doing music and concert tickets.
BTW, I'd love to see the long tail get taken care of properly. That's what I'm really interested in. I'd probably use a 'what's on tomorrow' page for small shows 100X more then a 'what's on this month' page for $100 + shows.
Any way crack away at the RIAA thing.