This exists for certain stores/markets in the US. Its called Peapod and is available for Ahold subsidiaries. (mainly Stop and Shop) The problem with it is their

This exists for certain stores/markets in the US. Its called Peapod and is available for Ahold subsidiaries. (mainly Stop and Shop) The problem with it is their interface/website is terrible and I would rather not get my groceries from Stop and Shop, so if you could provide this for arbitrary stores that would be awesome. I know other startups have tried in this area since the dot-com boom. (the semi-infamous Webvan) Currently it seems like Instacart is the lead contender in this area. I haven't tried them, but it looks like they just came to my area recently, so I might in the future.