Project management

For some time I have been using basecamp for project management, but I think it's too simplistic for my needs and I plan to switch to The Trac Project. Trac has a more sophisticated priorities and categories and it also integrates with my source control subversion. It's also open source and we can host it ourselves. (I also thought about resorting back to bugzilla)

I'm also interested in some of the plug ins for Trac, like the time and estimation plugin.