As for the centralized wiki, bbPress is going to change so rapid with major upgrades that the developers have opted to stay out of that idea until we are well into more substantial releases.
I will admit that I plan on helping Pro Forum as much as possible because it is a site dedicated to bbPress, but really doesn’t have to be affiliated with bbPress at all. Later on, if it turns out to be a great resource for bbPress users, it will get around on its own. These things take time to play themselves out.
But like I said before, this really isn’t a support issue and is best discussed in the dev lists.