Pretty close to what Webvan was thinking.... They had robotic warehouses, where the orders were packed by robotic systems, then loaded in to the truck. You are taking the next step; the delivery is automated as well. Considering the auto-drive lanes in the San Diego area, I suspect it could be easily done. My original comment to a Webvan exec still remains -- what do you do when there is an extreme slowdown, do you lay-off the robots? (yes, I know, and I said it, but it is true)