GoDaddy, the world's largest ICANN-accredited domain registrar, and SourceForge, the world's largest development and download repository of Open Source code and applications, appears to blocked in Mainland China again after Beijing 2008 Olympic Games closed.
A screen copy of the command tracert shows that the problem is a router inside China Telecom.
Update: SourceForge unblocked on Nov 2 2008, GoDaddy unblocked on Nov 10 2008.