In the wiki, http://www.gkbledsoe.com/articles/process/writing_prompt_generator.html, there was a page to help students think of stories to write, using prompts. That was fascinating. Since it was written by students it was very user friendly. However, the wiki at the "coolcat teacher" http://westwood.wikispaces.com/Web+2.0 most interested me right now. I have a scholastic class homepage and find it cumbersome. I have been looking for another way to post assignments and class news online that is easily accessible to parents and students. This looks like it may work well. I like the idea of using wikis for book collaboration and a class web site.
I did not find things that I would change about the wikis I read, although some did not fit the capabilities of my students. So while I would not use them as extensively as some that I read, there is a place for wikis in my classroom.