According to Forbes:

SHANGHAI (AFX) – Google Inc’s recently launched China portal was inaccessible in the Chinese cities of Shanghai and Beijing on Friday, although the US-hosted Google.cn site could still be reached from outside China.

Google’s launch of the portal has been the source of controversy due to the company’s decision to censor its search results in line with the wishes of the Chinese government. However, preliminary tests from Shanghai indicated that the service is inaccessible due to blocking by the government. 

Wouldn’t it be funny if after all that work Google has put in to censoring their results (and failing since censored content was accessible through misspellings) the Chinese Government decide to block Google.