The purpose of the HelpGlobe.com site is to create a cross between forums, Q&A, and Wikipedia.
How? You post questions and answers, both of which you can refine.
Why? Because as a knowledge base, you want to keep refining the quality.
Just recently finished most of the major features, with a lot of nights and sweat put into it. It has Ajax search, multiple sort and filter, topic helper, non-linear ratings and lots more.
Any feedback would be greatly appreciated.