Mark just published a Wiki plugin for WordPress on his Weblog Tools Collection.
This is great news, and I can’t wait to install it on my blog. I am a big fan of Wiki servers as collaboration tools and for simple knowledge management tasks, and even though the collaboration aspect would not really apply in case of my own Wiki as I would probably be the only one posting to it, it should be a convenient mechanism for me to publish non-blog content.
Nice job!