The Great Firewall of China

It is no longer a secret that Chinese government blocks and unblocks access to certain websites to limit certain informations flows into the country. Among them are Wikipedia, Playboy, Blogger Blogspot and Typepad. Some genius created some websites and tools to pass thru the firewall but they are also "from time to time" blocked by the firewall. But one can always access the blocked website using any of the thousands open proxies provided in internet. If one is blocked, you just try the next one.

Isn't the net an amazing world?