Just a very fast note about gluten-free product tours that New Seasons Markets do. This would probably be a good resource for people who are newly diagnosed and want to know how to find things at supermarkets. Their current schedule is available on their Health & Wellness Classes page. Here is a description of the tour from their website:

GLUTEN-FREE PRODUCTS STORE TOUR – CALL TO RESERVE YOUR SPACE!
Bring your walking shoes (and call the Wellness Department of the appropriate store to sign up) for this comprehensive store tour that illuminates the many products available at New Seasons Market that are gluten-free. We will provide menu ideas as well as our extensive gluten-free shopping list.