Another site that I've used in the past to buy GF food online is called
The Gluten Free Mall. They offer the ability to rule out certain ingredients as you shop online, a feature I first saw on Gluten Solutions.
I've had good results dealing with
The Gluten Free Mall, but because they ship their products from the East Coast, and I'm in California, it takes a few days longer to get things from them sometimes - for me.
The owner of
The Gluten Free Mall also operates other well known web sites for celiacs, and is an experienced webmaster.
Steve