Here's a vote for Instiki (http://instiki.org http://instiki.org), a super simple wiki clone written in Ruby (that's pretty straightforward to hack on, which is

Here's a vote for Instiki (http://instiki.org http://instiki.org), a super simple wiki clone written in Ruby (that's pretty straightforward to hack on, which is a pretty important consideration when using wikis for 'non-traditional' purposes).