He also talks us through some of the design decisions for the motion-control option. Of course, if you'd rather play through the game using your Dualshock, that's supported too.
What Guerrilla Games hasn't decided yet is whether while playing online players using Move will be able to take on players using the Dualshock. They need to make sure there's no unfair advantage either way, they say.
Killzone 3 and PlayStation Move: See it in action [Playstation Blog]