United States

http://groceries.tvheaven.com/index_1.html - this is my portion of this huge list we have been working on over at the Stanford Cooperative since 1986. It's a lot more information than what you will find here on this blog, so you may way to think twice or thrice (2 or 3 times) before printing all of it.

USA - corporate

http://www.delhaizegroup.com/en/default.asp - Delhaize - International Supermarket Conglomerate
http://www.bonappetitbakery.com/ - national bakery
http://www.ethnicgrocer.com - ethnic grocery mailorder
http://www.gandgmarket.com - Santa Rosa, CA markt
http://www.mealsforyou.com - Recipes
http://www.vitacost.com - Vita Cost vitamins