Updated on 25 December 2010 by Lokesh Datta
I am a big fan of Wikis as a collaboration tool, and understand part of my appreciation for them is that I am more of a "free format" sort of person -- rarely looking for a template. Thus my reasoning behind the post Collaboration is supposed to be messy.
At the same time, there is a need to provide some organization for a wiki or it risks going all out of control and becoming unusable for those who prefer templates. This article on Wiki Design (scroll halfway down the page to see it) provides some good tips and insights into how to loosely organize a wiki, from people who have experience doing so.