Closest thing i can think of is the Tesco API: http://www.programmableweb.com/api/tesco http://www.programmableweb.com/api/tesco edit: also, keep in mind the s

Closest thing i can think of is the Tesco API: http://www.programmableweb.com/api/tesco http://www.programmableweb.com/api/tesco edit: also, keep in mind the story of Webvan: http://en.wikipedia.org/wiki/Webvan http://en.wikipedia.org/wiki/Webvan