Yeah, one thread. Unless you were going to move towards a Wiki based system, like Redmine or similar, it could also incorporate bug tracking. I know there is github, but something more non-dev friendly. I find 500+ pages hard to extract useful data, it's a mess. Something structured would most likely cut down on the majority the repetitive questions that were answered 3-4 pages back. Instead of telling everyone to read the README, you tell them to read the WiKi.