That means Portal 2 sold about 1.3Million on the PC. apx. 1million through steam, Very nice indeed.
I imagine valve will put some of their games on the Wii U - it simply makes sense for them to do it - just don't expect any exclusives
Playing : PC AOE, DiRT 2, Runes of Magic, Wings of Prey & Planetside 2
Wii U : Nintendoland, Super Mario U & Fifa 2013 demo
DS : Guitar Hero : On Tour
Formerly unknown as Vengi