We have a Wiki this year in second grade! We started one last year, but didn't have as much interaction with the other schools and with our own students as we have had this year. This is my only experience with Wikis, however, so I was interested in looking at some of the others out there. To be honest, I thought Kubler's Reading Wiki had the most useful content...some of the others did not seem as strong. I liked that I could link to other Wikis. In fact a couple of other second grade classrooms came up and these may be worth contacting to expand our global connections for next year.
I didn't associate the name "Wikipedia" with being a "wiki", until now. I used to use Wikipedia often, but was dismayed to recently learn that anyone can edit the information. I now am leary of the accuracy of its content.