Thanks.
I'm willing to try installing a separate Wiki directly. The question is, which one? WikiMedia, as ka3 suggested?
[edit] And forums too. http://sourceforge.net/forum/?group_id=213163 [/edit]
[edit=2] What's wrong with the built-in one? We could set it up so that cboardwiki.sf.net redirects to there. [/edit]
[edit=3] We could set the "Space Permissions" on the Wiki to Public so that everyone can edit it. Or leave it as it is so that only members can do so. [/edit]