Download:
http://im.qq.com/qq/linux/download.shtml

Version:
linuxqq_v1.0.2-beta1_i386.deb

$ wget http://dl_dir.qq.com/linuxqq/linuxqq_v1.0.2-beta1_i386.deb

Install:
Tencent came out with QQ on Linux OS version eventually but it is a 32-bit .deb for Ubuntu.

Found the following to get it installed on my amd64-archi Laptop:

sudo apt-get install ia32-libs libqt4-gui libqt4-core
sudo dpkg --force-architecture --force-depends --install linuxqq_v1.0.2-beta1_i386.deb