QQ, for those that don't know, is China's most popular IM software. Usage is so widespread that among the younger generation you're near as likely to get someone's QQ # as you are their mobile number.
For expats in China and wishing to make friends with local Chinese, having a QQ account is a must. Though Western-based IMs are also popular, with Windows Live Messenger quickly grabbing ground from Tencents QQ, using the Chinese-made product will win you lots of points with your new found friends.
Though Tencent has had an English version of the QQ software since 2005, until recently English-speaking QQ-wannabes had to bribe their Chinese friends to do the registration process for them, asking them to signup and get them a coveted QQ # that can be plugged into the software and connect you to the Chinese IM world.
my QQ number is 3900732 ,awaiting for your touch!