Jonathan Zittrain and Benjamin Edelman from the Berkman Center for Internet & Society at Harvard Law School have published a new report on Web censorship: Empirical Analysis of Internet Filtering in China.
From the abstract: “The authors are collecting data on the methods, scope, and depth of selective barriers to Internet access through Chinese networks. Tests from May 2002 through November 2002 indicate at least four distinct and independently operable methods of Internet filtering, with a documentable leap in filtering sophistication beginning in September 2002.”