QQ has reached 500 million users in 2007 [1]. Recently QQ announced they have 100 million simultaneous online users [2]. [1] http://www.readwriteweb.com/archiv

QQ has reached 500 million users in 2007 [1]. Recently QQ announced they have 100 million simultaneous online users [2]. [1] http://www.readwriteweb.com/archives/qq_china_im_web20.php http://www.readwriteweb.com/archives/qq_china_im_web20.php [2] http://en.wikipedia.org/wiki/Tencent_QQ http://en.wikipedia.org/wiki/Tencent_QQ