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...
I also think - it would be much better to have multi-language forum (like AutoDesk now). Then forums like ArchiCAD Link (French), CADStudio forum (Russian) and another one (if exist?) can be all in the same place. Each language branch might have different moderators, even current independent forums can migrate into one.
Because currently it's strange to see sometimes users are writing posts in another languages - and have to receive notes that "this is English forum only" and then moderators must manually translate the post.