Of the options suggested in response to my question about 
<a href="http://www.scotlandsoftware.com/blog/index.php/meta/whichwhich.html">which wiki software to try</a>, 
I liked <a href="http://phpwiki.sourceforge.net/">PhpWiki</a> the most (perhaps not least because O'Reilly's 
MacDevCenter recently had an article on 
<a href="http://www.macdevcenter.com/pub/a/mac/2003/06/05/wiki.html">setting up PhpWiki on OS X</a>, 
and the article mentioned <a href="http://flyingmeat.com/voodoopad.html">VoodooPad</a> too).



I've set up a PhpWiki installation to play with; at the moment, it's intended to become a repository of miscellaneous 
Cocoa code snippets and notes I find useful. Hopefully I'll remember to update it when something suitable occurs to me! 
You can <a href="http://www.scotlandsoftware.com/wiki/">play with it here</a>.