Heh. Just as I was wondering if I should even bother including nutrition information on specific foods, I started reading Michael Pollan's In Defense of Food. His take on the Western diet's shift towards valuing the nutrition in food rather than the food itself - "Nutritionalism" - is damning.
Well now, that will save me some work. I was dreading the research. Anyway, it makes more sense to teach good eating habits from a perspective of "see how yummy this diverse array of whole foods looks!"