I got a MacBook Pro (2.66, has the 9600 graphics card with 256 vram), and I've been amazed by the battery life I get with the 9400. My question is, I don't notice any performance difference between the two graphics cards. Granted, I don't play games or do video work, but I do quite a bit of Photoshop and online tv watching. Seems like the 9600 is kind of useless for me...