See Who's Editing Wikipedia

[sparklehorse]

http://wikiscanner.virgil.gr/

See the article here:
http://www.wired.com/politics/onlinerights/news/2007/08/wiki_tracker

Wikipedia Scanner -- the brainchild of Cal Tech computation and neural-systems graduate student Virgil Griffith -- offers users a searchable database that ties millions of anonymous Wikipedia edits to organizations where those edits apparently originated, by cross-referencing the edits with data on who owns the associated block of internet IP addresses.

 

[Skeptik]

Interesting, but not surprising to see those with a vested interest editing content.