When Bella was born I somehow started receiving free subscriptions to both Parents and Parenting magazines. I usually toss (err, recycle) them when I get them, but a cover article in the June issue caught my eye:
Food Allergy News You Need
Forbidden Foods, by Jan Sheehan
So I took a look, expecting a dumb article about peanut butter alternatives (like almond butter - d'oh!). But you now what? It's actually really good and gives a good overview of food allergies, research, etc.
Unfortunately the folks at Parents Magazine haven't linked to the article online, but I encourage you to pick up a copy (or read through YOUR recycled one) and take a look.
I'll try to scan the pages today and/or find a link to the article (somehow).