Boing Boing reported that an hour long video satire of Chinese government censorship, called War of Internet Addiction, has had 10 million views by Chinese netizens.  It was filmed entirely in World of Warcraft.

You can find commentary at DigiCha and YouKu Buzz. 

The original video is at the YouKu Buzz link, but the speed is very slow.  You can find an English subtitled version at YouTube in seven installments.