Andrew Parker and I recently wrote a post on the USV blog about “The Mobile Challenge” – looking for apps that make use of the unique capabilities of the latest (smart)phones to deliver experiences that were previously impossible. Since writing that post, I have become fascinated with augmented reality apps, such as Wikitude by Mobilizy (Austria), Layar by sprxmobile (Netherlands) and Sekai Camera by Tonchidot (Japan). I have no idea how well any of these actually perform, having only experie...