I see a lot of "80 top CSS Web Design" links, and are usually disappointed with the results. This site, however, has wowed me with some really fastastic stuff.
I've put off my site redesign long enough...this weekend, the work starts.
Also, open Sourse Web Design (oswd.org) has a great selection of CSS-based designs for free. Many are intended for blogs, but a lot can bu used for traditional websites, too.