greatfirewallofchina.org enables you to see if a website is censored in China. You can do this in real-time.
It is estimated that some 30,000 Chinese civil servants are monitoring Internet traffic and blocking content that is deemed undesirable. Typing in sensitive keywords such as 'democracy', 'Falun Gong' or 'porno' in a search engine results in an error message. Websites of a sensitive nature are being blocked. Internet service providers also (self)censor, as do individuals: many people do not express their real thoughts because they know these will be censored anyway.
torontomike.com was blocked but TorontoMike.com was available. We just need to tell China there's more than one route to Leaf game recaps, children's television flashbacks and Homer Simpson quotes.