I attended Robb Wolf's day-long Paleo Solution seminar on Saturday, which I highly recommend. Robb is super nice guy, and really knows his stuff!
There was a question that I meant to ask him, but didn't get a chance. If grains contain anti-nutrients because they "don't want to be eaten," why wouldn't that be true of all plants? Presumably brocolli does not want to be eaten either, so why doesn't it protect itself in the same way? I think Peter at the High Fat Nutrition blog is actually starting to argue this--that all fruits and plants are problematic in some way (except for root vegetables and tubers, since being underground is their "protection.")