My 7 yo has allergies to peanuts and milk. It can be frustrating at times, when he sees other kids eating things that he can't have. Overall, he does well with it, all things considered. If I get frustrated, I always remember that in the grand scheme of health problems, this is a minor one.
His last blood test came back negative for peanuts, but when we did the challange, he still broke out in hives.
Our other children don't have food allergies either, but I did as a child, so I'm hoping he will outgrow it. One thing that we have done is avoid any nuts at all. The allergy specialist we went to when we were in Baltimore said that there can be cross contamination.
Anyway, one website that I used when we first found out is the food allergy network
I haven't been on there in a long time, but they have alot of info that you might find helpful.