Thanks again to my friend Matt, we now have a consistent basis to rank mediawiki sites on www.wikindex.com. The score is essentially a combined log(10) of the daily updates, number of articles, and user count. The philosophy guiding the score is that a successful wiki is really reflective of an active community, and would need a fair population of users, a critical mass of articles for a base reference, and maintenance/currency from daily updates.
If you have a wiki, please consider adding it to the wikindex. We will continue to work on gathering stats from the dekiwiki crowd and hope to add those rankings in as well. We are open to any suggestions for improvement. One that occurs to me: remove the google ads– maybe not worth it?
Some odd things to note from the rankings: World of Warcraft fanboys write a lot, but not as much as the Star Wars geeks (Triumph could have told you that). Both beat Star Trek. Superman and Batman are bigger than Final Fantasy (as it should be) but smaller that Yu-Gi-Oh (Wha-t3h-fu?). Just outside the top 50, however, is a wiki about furries (*blech**shudder* no link on purpose) and it’s bigger than the Conservapedia: a wiki for right-wing nutters.