Esquire magazine writer A.J. Jacobs put up an article on Wikipedia about Wikipedia and asked the community to edit it. Esquire will publish the final version in their December issue.

The original version (Sept 20) was a rough draft with many--some intentionally added by the writer--errors. In the first 48 hours there were 373 edits. On Sept 23 the article was deemed complete and locked at 771 words (originally 709).

Read more about it at CNET's Esquire wikis article on Wikipedia