The definitive listing of wiki forums generally open to the public can now be found at the WikiIndex project.
* http://wikiindex.org

See also:

* WikiForumsWanted
* CategoryWikiForum lists pages on WikiWikiWeb about other wikis.
* Items tagged with "wiki" on DelIcioUs: http://del.icio.us/tag/wiki
* Another fun way of finding WikiForum''''''s is to do a whois search for "wiki":
** http://www.whois.net/search.cgi2?str=wiki&Search=Search&query_type=any&as=1

For general information about starting your own wiki, source code, etc., see WikiWikiClone, WikiWikiClonesQuestions.

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CategoryWiki