I saw the craziest thing the other day. I was checking email from home, when all of a sudden I got stuck on the "Loading..." message, and then "Can not connect to gmail.com", etc. I thought that was kind of strange, so I tried a nytimes article as well as google.com, and both hung a really long time before landing on the same page. It was a photograph of the earthquake in Sichuan, with a whole bunch of Chinese text!
Think about this for a second. The Great Firewall hijacked everyone's internet connection in China at the DNS level and redirected all websites to an earthquake commemoration page or something (I couldn't understand it). I wanted to capture a screenshot, but forgot how to do it on Mac, and couldn't search for it since the whole internet was redirected.