If you think TiddlyWiki is wonderful, except that it is not a real wiki in the classic sense of the word, Giewiki could impress you even more.
Giewiki tries to be a real wiki: you get preview and versioning of tiddlers, any number of pages in any hierarchy, an auto-generated sitemap, comments on tiddlers, fine-grained access control, image upload, recent changes, etc.
Getting your own copy up and running on Google App Engine's free hosting domain is easy, as described in the DeploymentGuide.
Beware that if you have an earlier version installed already, you need to visit http://appengine.google.com in order to make the new version the active one (via the versions list). The 1.x releases appears as version x.
What's New in This Release: [ read full changelog ]
· Bug fix release: File upload to sub-domains