When better to advertise to someone than when they’re engaged in the activity of shopping? As proof positive that there’s no surface in the modern world that won’t eventually be used to barrage you with information about products that you almost certainly don’t need, a company called Modstream is pitching scrolling text ad displays that are embedded in the handles of shopping trolleys (or carts, as you call them on the other side of the pond) which can have messages beamed to them wirelessly. As Engadget points out, though, there’s plenty of opportunity for comedy hacks and culture jamming right there … [Image by Cyron]