To be more specific, I tested it on Resistance: Fall of Man and it has more than one rumble. When you shoot your machine gun, it feels like a vibrating phone. When you get hit, it feels like the traditional rumble that we're used to. Different feel for different situations. It's great. Also, it still has the sixaxis motion censors and is a little heavier.
Unfortunately, it doesn't work for NHL 08, but I'm sure 09 will have that capability.