Discovery of Wikis

I have just read some of the articles and examples of Wikis, and am starting the discovery exercises. I found the 'Using Wikis to Create Online Communities' article the most helpful in clarifying for me what a wiki is (as opposed to a blog or social networking site or website) and how they might be used. I like the idea of using wikis for conferences, and can really see the value in Subject Guide and also Catalog wikis. I know personally I use the library catalgoue quite a bit, and I am much more likely to place holds on and borrow books that have descriptions and pictures than ones that don't - using a wiki to allow the general public to update the catalog listings seems like a great idea, although I think there would need to be some kind of control and regulations on it.
I liked the SJCPL Subject Guides wiki, and how if you logged in you could comment on titles, and also thought the links to other sites would be really helpful e.g. on the 'Cooking' page there was a link to a local Farmers Market, this would be a great resource for visitors to the area, and a great promotional tool for the markets themselves.
I thought the Princeton Public Library's 'Booklovers Wiki' was a great use of this tool. It is a shame that they didn't continue it, but great that they evolved from this original idea to upgrading the catalog to include reviews directly. I can see potential to use this idea for the Book Clubs that we run at South, Upper Riccarton and New Brighton libraries, and think that in fact Julianne may have already planned this for our Summer Reading program. Also for Reading Crusade, it would be fantastic for different schools involved in this to be able to share their progress, reviews etc throughout the program using a Wiki. I can see the benefits for this especially for less local schools e.g. Maruia School.