Also see http://www.marksdailyapple.com/definitive-guide-grains/ and then maybe http://www.marksdailyapple.com/gluten-celiac-disease/

Several people have referred me to Mark's blog in the context of paleolithic dieting. I've been going through the archives, and it seems pretty solid. Of course, like many blogs now, it's really half blog, half sales funnel for information products.

(Which is totally cool, but it sometimes overshadows the fact that the blog posts themselves are valuable.)