The upcoming CounterStrike: Global Offensive is not only cross-platform compatible between Mac, PC and PlayStation 3 but it will also support mouse and keyboard play on the PS3.
Now, both of those news tidbits might have taken your breath away, but we are talking about Valve here. PS3 owners will have the choice of the standard Dual Shock 3 controller, PS Move and the keyboard and mouse. Gabe Newell has also said he'd love to have Steamworks on the Xbox 360, but Microsoft are not playing ball.
The beta of GO starts in October and the trailer above should get you excited if you're a CS fan.