All PS3 games are region free, you can play any PS3 game on any PS3 console.
OT the one thing which I believe WKC has going for it is that it is the first really big JRPG to be hitting the system and there are a lot of JRPG starved PS3 owners around the world. This game has has all the attributes to sell huge, Sony need to do something though called advertising.