In the features section of the Jerusalem Post (http://www.jpost.com), there is a report about the efforts of a New York based activist who is using Googlebombing (essentially, convincing others to set up links in a particular manner) to change the search engine's top ranked answer to the query term "Jew". Apparently, at the time the article was written, it brings up a rather nasty anti-Semitic site, which this individual is trying to replace with...a Wikipedia article (in terms of the top ranking on Google).
Given the nature of the attention this could bring, I suspect we should keep a particularly close eye on Judaism-related topics for vandalism and partisan editing (of any kind) over the next few days.
If you want to read the article without registering at the Post, do a search on http://news.google.com for Wikipedia.