joined:June 10, 2003
Several systems propose answers based on real-time search as you type in your topic or body, and sometimes you get a good answer. Some (all?) of the Google help fora do something like this, and it's pretty good.
And if the user still asks the question, it might be presented alongside of some similar other threads.
Search is a big issue here (as it is everywhere) -- it needs to be integrated and contextually sensitive.