From AP:
Several Chinese Internet sites and parts of popular Web portals went offline Tuesday amid tightening controls that have already left mainland Web users without access to Facebook, Twitter and other well-known social networking sites.
Digu and Zuosa, two Chinese Web site that offer micro-blogging services similar to Twitter, were both shut down for maintenance, according to notices posted on their homepages. A Digu spokeswoman who would only give her surname, Zhang, said the site was offline so it could be moved to a new server. She said it would be down for at least a week.
“It’s a sensitive period, so we are not in a rush to re-open it,” Zhang said, adding that some Digu users had recently tried to post politically sensitive material to the site and that the company was having to censor such content. She wouldn’t give any specific examples.