I would like to see more advanced forum engine here. Something like Stack Overflow UI - when person after he receives an answer can rate it. The answer with the highest rate shown as an answer to question. People, who are answering correct and have highest rates are collecting scores. People with higher scores getting something - like proposals to do something on forum... You know, McDonalds like career system.
This question / answer database can also be connected to Help Centre with more advanced search engine...