Investment wiki that has good investing tools and will rack your investments
A Wiki site devoted to Chester UK
A program language wiki, as Johnathon says is for himself, like an open notebook
A How-to wiki covering numerous topics
A science wiki that also covers MediaWiki tips
A Consumer electronics review wiki
Covers Social and Physical Sciences and Religion
Wiki for conservatives who think Wikipedia has left wing bias
A spoof wiki "a la" Colbert Reportsee also http://uncyclopedia.wikia.com/wiki/Main_Page