As of July 18, 2009:

• facebook.com
• twitter.com
• *.blogspot.com
• bloglines.com
• *.wordpress.com
• www.greatfirewallofchina.org
• picasaweb.google.com
• news.wenxuecity.com
• www.youtube.com
• my.opera.com
• http://en.wikipedia.org/wiki/List_of_websites_blocked_in_the_People%27s_Republic_of_China

Updated July 29, 2009:

• www.metacafe.com