hello ... I agree, the Keyboard & Mouse combo is just unbeatable for some kind of games, but the idea of cross-platform gaming is interesting, i really would want this to be implemented. I know we have keyboard & Mouse mappers for PS3, don't the Xbox have same ? Well you can't control what the users are using, so i guess would be good if they could cross-platform ONLY if some conditions/criteria are met. anyway, too bad, but here MS had good reasons. ... & the truth is when we are a gamer, we are not forced to be limited to ONLY 1 platform ... I play on PC + PS3 (best of both world) ... cheers!