Want a little bit of crazy good news with your Monday sunshine? Nokia has just told us it's launching a fleet of seven black cabs in London, and one each in Manchester, Birmingham, and Glasgow, which will be giving free rides to all punters for a week. This gratis taxi service is kicking off tomorrow and is intended to promote the righteousness of the free Ovi Maps turn-by-turn navigation, which as you'll by now be aware, can be had on most of the Finnish company's handsets. Each cab will be equipped with an X6 providing directions, so you'll get a neat demo of the software in action while enjoy Nokia's generosity. And this