This is a nice installation from Nokia. A digital panel in the shape of arrow was lifted 50 metres above London by a crane. People on the street could send text messages directly to the live sign with their favorite places to visit, and the arrow would move to point to that location, and also provide the distance!
The installation was streamed live to Nokia.com, where all the locations were synced with Nokias good things map. A great way to promote their geo-localization for mobile OVI Maps.