China, and blogs on Filtering
Last week, Chinese blogger Michael Anti gave a talk at the Berkman Center on the world of political activism in China, and its (non) use of Web 2.0 tools. According to Anti, any service that requires a centralized server has limited usefulness for Chinese activists -- Twitter, blogs, Flickr, etc. On the other hand, messaging systems and email, non-centralized services, are invaluable.
David Weinberger blogged the talk and Ethan Zuckerman and Rebecca MacKinnon also provided fantastic reviews of the issues here and here, respectively. Rather than rehash here what they've said eloquently, I encourage you to take a good look at their posts.
John Kennedy rounds up the issues surrounding Chinese citizen Du Dongjin's lawsuit against Shanghai Telecom for blocking.