Esquire writer A.J. Jacobs recently set out to write an article about Wikipedia. With the consent of Wikipedia's managers, he decided to test the Wikipedia process itself... by posting an error- and typo-laden version of the original article on the site and inviting the community to correct and improve it.
Here's what happened:
Wikipedia:Improve this article about Wikipedia - Wikipedia, the free encyclopedia
Related: CNET News story on the experiment