We have a variety of resources we can offer groups who feel they need a wiki, from hosting to security certificate to subdomains with a range of groups.
M. Schindler, and D. Vrandecic. Proceedings of the WebSci'09: Society On-Line, Web Science Overlay Journal, (March 2009)http://journal.webscience.org/213/1/websci09_submission_120.pdf.