Seed Magazine was rebuilt with Movable Type. Here’s how it was done.
(via Kottke)
Not that it hasn’t been done before, as Matt Haughey had an article on using Movable Type for all sorts of sites.
Of course, nice websites can be built with WordPress as well, like California Connected. They even allow trackback. I wish I could find the blog post that talks about why they chose it over Movable Type.