We just started Feingold about a month ago and it is a life changer!
It is really overwhelming at first, but 20X more overwhelming if you don't actually join the organization. At this point we have started on stage two (not recommended by the organization, but seemed easier as a starting point to me) We will be implimenting stage one after we travel this spring. The plus side to starting at stage one instead of easing into it is that the results will be more obvious and you can add foods 4-6 weeks later instead of making all new cutbacks, which might be discouraging to an older child.
The materials have a two week menu plan with recipes, details about how to tell if the behaviors you are seeing in your child are a food reaction or something else, and the message board is very active and VERY helpful. Many people on the program have other food limitations (check out my daughters allergies lol). There are shopping lists and an "any brand" list (things like any flour, any whole milk, etc.) that really helps all the shopping around. There is even a recipe only message board.
The theory of "all organics are ok" is unfortunately not always true because oils or fats used in making the products may come with preservatives (sometimes BHT) in them when they are shipped from a third party. If the third party oil has less than 2% of the preservative, it does not get listed on the product you purchase. Milk is best whole because vitamin A palmitate is frequently preserved with BHT. The Feingold organization has volunteers who contact manufacturers to determine if they use safe products in their manufacturing and provides an extensive list of which foods are approved.
If you are trying to do Feingold without the support of the organization, it is like reinventing the wheel. It is worth every penny of the membership fee.
The blue book on the main page is a great place to find info all in one place if you are trying to decide on joining.
http://www.feingold.org/pg-blue.html