Also, I agree with you about the raw thing. I have never shot with raw, but I figure that that is what I'll do if white balance is a serious concern. Heck, maybe I will will end up shooting raw all the time, I have no idea at this point.
That is an excellent tip. In fact, that is exactly how theidea got going that resulted in the development of the Expo-Disk and Expo-Cap hardware. The finished product is a lttle bit closer to the actual WB, but the difference is very small indeed.