If you are a Wikipedia fanatic or critic then this article on the Wikipedia Scanner is a must read.
Wikipedia Scanner was created by Cal Tech graduate student Virgil Griffith. It allows you to discover the organizations that have apparently edited the seemingly anonymous Wikipedia entries by cross-referencing the edits with the internet IP addresses of the editors and the IP address owners.
The bottom line is that you can now get an idea how Wikipedia is being 'gamed' and this is forcing the Wikipedia Foundation to review
how articles are edited as this New Scientist article explains.