Wowpedia have disabled Special:PopularPages
As per the 'Currently unavailable special pages' section in their 'Help:Special page' article 'Special:Popularpages : The most visited pages. Currently disabled.'
This has been asked about on the talk page, and the answer was that it was done to reduce load and speed up the site. I've posted a link to this article and pointed out that Special:Popularpages is scientifically useful to this wiki. Hopefully it will return at some point. (One of my main reasons for coming back to this page is to compare the wikiFactor of Wowpedia and WoWWiki. I enjoy seeing Wowpedia catching up the wiki that uses its original name.) David Shepheard 13:15, 28 February 2011 (PST)