I tried it for mine and my daughter's ADHD last summer. To be honest, I don't think it helped our symptoms much, but we are mostly ADD, so there was no hyperactive component with us (idk if that has anything to do with it though). My friend has celiac disease and recommended The Gluten-Free Bible which is an awesome source for information.
I will probably go back to being gluten free after we get my dd's comprehensive evaluation done. I want to know how much of her issues are ADHD, and how much is processing issues, etc. We kind of let things slide when we went trough some stressful times the past several months. I do think it made me feel better and more energetic. The biggest obstacle for my dd was that she loves bread. We call her the carb queen because she lives for pasta, bread, etc. But we found substitutes that seemed to be fine for her.
at 3:15 PM on Jul. 5, 2010