internet - More blocks on foreign weblog hosts

Anger is hitting the Chinese blogosphere as a Typepad, a foreign weblog hosting service seems to be blocked this morning, according to report by Brainsmurf, followed by Living in China.
All weblogs hosted on domain names with 'typepad' are now blocked and it is a similar problem that started last year with the largest weblog hoster blogger.com when all its weblogs with 'blogspot' in its domain were blocked.
It is different from the main-land based services like Blogbus and BlogCN that were ordered to shut down and have since been cleaning their servers from possibly political incorrectness. That ardious task is hard to perform, and would possible mean a move of China-based webloggers abroad.
Since screening of individual logs is an almost impossible task a blanket ban of some of the larger weblog hosts seems a rather easy alternative. Apart from political reasons, commercial reasons might also behind it. The recent trouble with Chinese hosts has put them in a commercially unattractive position and this blockade of foreign service providers might prevent them from getting a commercial 'advantage' because of the domestic restrictions in China.