Stop going on about it?
Scripting News: 6/11/2005: "The Wikipedia history of podcasting has been carefully rewritten to eliminate any mention of my work"
One way to prevent this particular defacing might be to stop complaining ! Seriously, I bet someone did this as a form of protest about the continual complaining about attribution. I wonder how many more time Adam Curry will mention Dave W in his interviews (even if they don't amke the actual article)
Via James Robertson who raises the more important point about the wonders of Wikpedia's "self-healing".