For your information, QQ is the most popular IM in China (initially called QICQ). It has more than 100 millions simultaneous online users (http://webcache.googleusercontent.co...ient=firefox-a) i.e. the number of online users almost exceed the US population.

Stock trading and QQ support is the two key selling points for high-end mobile users' market. I'm not be able to get in touch with a user with official launched N900 in China, so I'm not sure if the Java and QQ comes pre-installed with it.