A booklet containing a lot of experiences and suggestions is currently prepared for printing. A draft is online available for feedback:
Page 4 contains a nice visualization of the difference of web and wiki (targeted at normal people).
Andres and me are cooperating with a number of teachers (wiki projects) at schools and pedagogical institutions (not universities). We would like to find more teachers around the world interested in collaboration. Remember FreeWikisForSchools. -- HelmutLeitner