Wikis work best in environments where you're comfortable delegating control to the users of the system.
We erased a problem by not trying to erase the problem, by saying, "This is in the nature of what we do." It's really weird that it could be that simple.
I can't tell you how much time is spent worrying about decisions that don't matter. To just be able to make a decision and see what happens is tremendously empowering, but that means you have to set up the situation such that when something does go wrong, you can fix it.