I think I'd like to see a redesigned case, first of all. It's nice and everything, but it's obsolete. It's been in production unchanged for six years. Also, a nice ThinkPad-style keyboard would rock on the MBP. If you've ever used one, you know what I'm talking about.
Not like I particularly care or anything, the black MacBook is the perfect machine for me.
EDIT: Oh, and to the poster above, a number pad on the 17" MBP would be functional, maybe, but it would look stupid. Haven't you seen the 17" Dells and Toshibas with number pads?