I'm of the opinion that Tremulous needs an official online documentation (not a wiki). It should contain things like information on current development, a coder's guide, and, of course, a manual.
Why shouldn't it be a wiki? For the simple reason that it should only contain information that is known to be 100% true. The only experts on Tremulous are the developers, and as such they are the only ones who should be allowed to maintain this hypothetical documentation.
I'm working on something called FooDocs that might be useful for this purpose. Does anyone else think an official documentation is a good idea?