Via the still banned-in-China RConversation, China has blocked free Wordpress service blogsome:

Blogsome, the free Wordpress blog hosting service based in Ireland, is now blocked in China, according to Chinese blogger Maomy, writing on the Chinese group blog, CNBlog.
Maomy - who himself blogs on Blogsome - says the free open source service has become increasingly popular among Chinese bloggers, but that he hadn’t expected it would be blocked so quickly. Despite the wishful thinking of some, he doesn’t believe Blogsome’s inaccessibility is likely to be an innocent "technical problem."
Other Chinese bloggers I’ve been communicating with tend to believe this is all part of a tightening-up in the run-up to the June 30th deadline for website registration.

Also note Rebecca’s look at China’s use of internet filtering technology and US corporate complicity plus reporting on gamer reaction to Microsoft’s China policy.