If you live in the West Hartford, Connecticut area, you may be interested in a new study being conducted by the New England Food Allergy Center. It is a desensitization program whereby small amounts of peanut protein are given to a peanut allergic individual over a period of time. The study starts with visits to the Center and are continued at home.
Unfortunately most insurance companies won't cover the costs, which will be in the $3000 range. It may be worth checking with your insurance though. Don't be afraid to escalate this to the medical director of your insurance carrier, who can often over-ride what customer service representatives are told to tell callers.