This looks cool, it’s called Geeklog and claims to be the ultimate weblog system.

Geeklog is a ‘blog’, otherwise known as a Weblog. It allows you to create your own virtual community area, complete with user administration, story posting, messaging, comments, polls, calendar, weblinks, and more! It can run on many different operating systems, and uses PHP4 and MySQL.

More features are listed on the site. I ran across it tonight while I was searching Google.