We're generally reluctant to cover purely promotional stunts like these, but when you decide to jack up a house-sized arrow on a crane and hang it next to London's Thames river, well, exceptions can be made. Nokia's big push to inform the world that Ovi Maps is free -- now and forever -- has culminated in the above sign, whose most appealing feature must be that it allows commoners like you and us to control it. People can send in
