(6) Loretta Chao and Josh Chin, Sina Weibo Releases US User Numbers. China Real Time, Nov 16, 2011 http://blogs.wsj.com/chinarealti ... hing-on-in-the-u-s/
("Sina Weibo now has 450,000 users in the US, or roughly .2% of the 227 million total user accounts the service claimed in September. It’s not clear how many of those users are Chinese students or other Chinese citizens living temporarily in the US")