[eluser]BrianDHall[/eluser]
My vote is perhaps for a wiki-style FAQ system, or maybe even a yahoo-answers style FAQ system. Then one someone asks a question that's been asked 10 times in the last week it could easily become a standard to just link them to the necessary FAQ and no need for repeating the same information. It could easily grow into a very powerful resource, like "An Unofficial Advanced Manual for CodeIgniter".