There's a new tool that lets you see the sources for anonymous edits made on Wikipedia. Naturally, hilarity ensues. The best one so far is an edit to the "George W. Bush" page originating from the ever-impartial New York Times:
Submit your favorite self-interested or vindictive edits to Wired's Wikipedia Wall of Shame.
Update: Doubters can see for themselves by clicking on the image, or looking up the IP address at the top to verify that it belongs to The New York Times.