Wikis

I can see that there are many library wikis out there. Since I have never participated in using one this is all very new to me, although I have been using Wikipedia for some time now. Now, I don't contribute to it, though and I am not sure how one goes about doing that. At any rate I can see the application for communicating ideas, maybe doing book reviews, sharing ideas and knowledge. I suppose I could read more and then try to contribute.