Kevin was an amazing talent. For having passed at such a young age, he produced an enormous body of work. He worked with DB on a few songs on Triage, one track on AFM, and of course on Sheryl Crow's second debut album. 

My favorites are The Shaming of the True and Kaviar, which were both completed after his death. They both highlight his amazing musical genius, and also his dark humor and wit.

The Kevin Gilbert web site has a ton of good stuff on it, and the evil wench webmaster they had has been finally cast out. All of his official releases are available there.

You may also want to tune into Gruno's show on The Dividing Line - he plays some unreleased rarities nearly every show.