Great Firewall of China is a free online tool that connects to a server in China and check if your website or blog is blocked or banned in China. A disclaimer on the website states that some sites might simply not be available for techincal reasons which might have nothing to do with censorship. (via)

Thankfully, Tech[dot]Blog’s URL is not blocked including the post on Bypssing Proxies and Firewalls which was featured on BoingBoing. Interestingly, websites like BoingBoing and Fark.com are blocked.