Revision wikis

I've only recently started getting interested in wikis, and thinking about how they can be used in schools, compared to the potential of using a blog. A podcast by Joe Dale recently alerted me to work being done by a previous Head of Department of mine, Peter Morris, at Gordano School near Bristol. Now I know this isn't a good time to be flagging up revision sites (we have a stream of Year 11s handing in their textbooks today now it's all over) but Gordano's German and French revision sites are interesting ones to have as links on your blogs or intranet pages. I've started a wiki link roll, so please let me know if you are aware of any others for the list.