I haven't dived into it fully but Leo Laporte and many of the very knowledgable former TechTV guys use Drupal. He runs the site
The TWiT Netcast Network with Leo Laporte (covers the development of the web), Kevin Rose started digg and Chris Pirillo host a tech conference.
drupal.org | Community plumbing. It's blogging with more features and it doesn't too obviously look like a blog.