Does anyone know of a that lists musician credits, like Internet Movie Database does for film and TV? CDNow used to have a great feature that it would list all playing and production credits for almost all albums available on its site. You could also link to almost any musicians "other credits" to find out what else they might have played on, as long as they were listed in the credits. It was the only reason I had for going to CDNow anyway.
I'll second the allmusic suggestion. I've been using it for years, and is always my first stop for any music questions