Though this giant arrow is no longer up, I like the creative concept and how this video succinctly explains Nokia's idea behind it. In order to get people to think about Nokia when they think about navigation, they put up the world's biggest signpost (arrow) in London. Help up by a crane, the arrow was a digital panel where people on the street could send text messages to. Their favorite places to visit would show up, the arrow would point to that location, and also provide the distance. Cool concept.