I use WordPress on my own 'work' site (http://www.funkyfish.net/2005/) as a blog+CMS since WP1.2. I can be contacted there or via ade (at) funkyfish (dot) net. I have also used WordPress on a few recent projects.
A brief bit of info about me -
Personal: 34 years old, London UK, Musician/Web-Developer/Bum, 3 kids, 3 cats & sleep-deprived...