Speaking of mobile phones, the Margin is immensely grateful to the Japanese for this week unveiling the kind of phone you wished you had as a boy scout. It features a built-in global positioning system for lost users, along with e-mail and a digital camera. Made by Seiko, the Locatio-COM, measures three inches by seven inches. The phone allows lost users to input an address and, with the help of a GPS satellite and colour liquid-crystal display map, it can guide them to the right destination.