I had fun looking through these Wikis. I can see that there have been multiple contributors, in a tidy, well arranged format (instead of a long string of discussion items, such as in a blog). My favorite location was wetpaint.com, maybe because it was the most attractive to me, maybe because the video (by the same guy we watched before!) made perfect sense to me.
I can see the benefit of Wikies in constucting a centralized place for community information. It's still a little scary/overwhelming to me, but I think I would just need to try it out. Everything is harder before I try it.