I've used WP as a CMS on my new site FilmNite.com. I used two versions of index.php to generate a fairly static main page, and a blog-like serving page for the rest of the posts, called home.php. Basically, it lets you create pages for a normal static site using WP. I've posted a tutorial on my blog at http://www.radicalcongruency.com/20040531-tutorial-using-wordpress-to-power-your-non-blog-website. Public domain, so steal away.