275 million blogs hosted on Blogger and they are block in China. That is one great firewall. Blogger access have been blocked since 17th May. The people should have their freedom. From labnol.org:

This “crackdown” could have some relation to June 4, 2009, the day when the world will mark the 20th anniversary of the Tiananmen Square incident or it may even be a service disruption because Google is saying that they are “working to restore access to Blogger in China.”

In either case, users have been unable to access Blogger inside China since May 17th.

Read more at labnol.org