NaturalGrocers.com - Recommended by a viewer, this website is a great one stop-shop for dairy-free, vegan, lactose free, and natural bulk foods.  There is also a great "Shop by Diet" section that allows you to view only those products that suit your dietary needs (i.e. dairy-free, gluten-free, yeast-free, kosher, vegan).  Offline, they are known as Natural Grocers and Vitamin Cottage.