I recently did some development work for a client who gave me a template from these guys:
http://lionsterritory.com/
Cleanest CSS I've ever seen someone do... great use of cascading, lists, selectors... I write very clean CSS myself and I'm going to start using them to save time on my own personal projects. I'm very very very picky when it comes to letting someone else break up my design. Additionally it looked flawless in every browser.