Dominion forum threads directly as a FAQ because they tend to have a very low signal-to-noise ratio
Concur..
Currently, most tagged FAQ are guides atm anyways,
Rather, a FAQ would be better maintained in a single post in a Question \r Answer format.
For example, the What does Pusher do exactly? thread is a good question with a good answer
But there's a lot of extra posts in there..
Having a single discussions marked FAQ, updated from the posts creator and getting inputs from further posts would work well IMO.
In fact, this post (for extensions) follows this format perfectly.