From ONI Blog:
ONI compared data from the Olympics Main Press Center (MPC) to that from other locations in Beijing, compiling a snapshot of Internet filtering in China leading up to week 1 of the Olympics.
Journalists’ access is home access
For each test at the MPC, ONI tested at other locations in Beijing with broadband Internet access provided by China Netcom. The filtering was nearly identical between the MPC and home access in Beijing, indicating that the incrementally increased openness achieved by reminding China of its Olympic promises benefit all Beijingers. Tests across China suggest that the same sites have been made accessible elsewhere, with the exception of http://usolympictibetinfo.blogspot.com and the Tibetan and Uyghur language news sites of Radio Free Asia.
As noted in a previous blog post, any increased access to long-filtered content can be recognized as a promising development. However, foreign-hosted Chinese-language news sites have been the main beneficiaries of China’s Olympic guarantees, while the majority of advocacy sites and politically ‘sensitive’ organizations remain blocked. This filtering sweeps across a broad swath of issues, from the Dui Hua Foundation to the Three Gorges Probe, as well as nearly all Tibetan advocacy organizations. For example, while Chinese Wikipedia is accessible, the filtered status of Boxun.com, a dissident news website that Chinese government officials reportedly look to as a source of internal news, remains unchanged. Furthermore, the accessibility of any website does not guarantee that content on that site will be available, as China’s practice of filtering keywords through a tcp reset appears as robust as ever. In just one of many examples, a video of a protest led by a founder of Students for a Free Tibet near Tiananmen Square triggered a tcp reset.
Read also CPJ concerned online curbs still restrict Olympic journalists from Committee to Protect Journalists.