[gphil]

Something that would be a valuable addition to this idea would be a way of starting out by making purchases on demand, and then being able to easily automate them if they are regularly occurring. For example, I don't pay attention to how often I actually need toothpaste, so right now I wouldn't want your service because I don't know how much toothpaste to buy, and how often I need to buy it. But I might want it if it tracked the toothpaste usage for me, and then I could automate it if it turned out to be a very regular need.