China's Green Dam doesn't matter - they have the Great Wall
China's Green Dam content filtering software may not necessarily go into all new PCs sold in China after all. Chinese news service Xinhua reported Thursday, that China's Minister of Industry and Information Technology, Li Yizhong said, that installation of Green Dam will be up to users and will not be mandatory.
Personally I don't think it matters. The Government of China still has other avenues available to block content.
Desktop PC-based filtering can always be circumvented by users. The Chinese Government, if they wanted too, could easily block whatever they find objectionable, at the main network access points and GigaPOPs that provide access to the Chinese population.
The network, and more specifically network gateways, are the real choke point for Internet control and censorship, in my opinion.