A place to chat about Katee: Katee Sackhoff Forum
Katee's page on BuddyTV, a site with lots of interesting TV stuff for your perusal.
The official Battlestar Galactica website and its accompanying forum.
Dark Thoughts is, alas, no more.
The Battlestar Wiki is full of useful information.
Another fan site. Some cool stuff there.
Yet still another fan site.