To kick things off:
My name is Matt Mullenweg, and my main WordPress site is at http://photomatt.net/ . I've done a lot of customization, though which each version of WordPress I have to do less and less. I blog mostly about web development, music, tech issues, and occasionally politics.
When I first started blogging I used MT, then I moved to b2, and now I use WordPress and love it. :)
In the future I want to expand my blog to have more multimedia content and a linklog.