I'm not sure if it's working.
I dunno man. There's a media thread over at GAF that was created sometime in November, and it's on pace to surpass the MGS4 thread in post count. I know that doesn't necessarily account for much, but to me, when the first 1K posts in the MGS4 thread are "wow awesome OP" it kind of means a lot.
I think once the game starts getting ads on TV (hopefully tagged with "actual gameplay footage") it will start to generate more buzz. But in order for Sony to really put KZ2 on the map, they will have to seriously put some "public eye" on it.
That, and it needs to be favorably reviewed by Game Informer magazine to GameStop groupies give it the two thumbs up (still it's unlikely considering PS3 is usually the anti-christ at Gamestop locales).