Sorry, I should really have said "Black text, lots of white with some black and some color on the WPS screen" as opposed to "White text, lots of black with some white and some color on the WPS screen".
I don't really care how much battery is saved on a totally stark black/white (or white/black) wps, as I like a little eye candy and am willing to give a bit of battery life to it.
(Aside: I still want the ability to totally blank the screen after X time or when the hold switch is on)