vuxi is a very simple static Wiki compiler.
Source is available on github.
I use vuxi git-driven, the pages reside in a git repository on kaja,
and there is a post-receive hook that updates the site:
#!/bin/sh
cat >/dev/null
cd ..
GIT_DIR=.git git checkout -f master
cd ..
ruby vuxi.rb
Then I just need to git push and the site will update automatically.