I'm interested in knowing how this site is built? I'm particularly interested in the self moderation system. I's very much like the one on stack overflow, or OpenERP. Is there a CMS, or framework including this functionality as standard? I wanna implement something like that on a forum and that would be a great help. Thanks for your help ;-)
Ask Ubuntu is designed with the Stack Exchange framework.
There is actually a Stack Exchange site dedicated to creating new Stack Exchange sites, called Area 51. Keep in mind that Stack Exchange sites are a community effort, however, and that creating your own for a forum may involve a little more work.