HN: Is Posterous blocked in China?

Happens to be in China for 2 weeks already and I cannot get on Posterous at all. However, I can access tumblr, wordpress, and typepad. And no, the posterous site is not down, because at the same time I can access it via a server in US from where I am.

IF it is blocked (don't see why, though), then bloggers in those platforms may not want to move to posterous too fast, unless if they don't care about the Chinese audience.