http://developer.rovicorp.com/docs http://developer.rovicorp.com/docs does some of this stuff, albeit it's a bit cumbersome. I'm still using them since they hav

http://developer.rovicorp.com/docs http://developer.rovicorp.com/docs does some of this stuff, albeit it's a bit cumbersome. I'm still using them since they have some metadata available which is unique. (these are the guys behind http://www.allmusic.com http://www.allmusic.com)