The N building in Tokyo, Japan is pretty cool. An Augmented Reality project started by Terradesign and Qosmo, The building's windows are QR codes that contain information about what's inside the building. Passersby can stand outside and point their mobile devices at the building, snap a picture and and find out what is going on inside using a QR code reader. The building also provides, sales information and specials for nearby stores. To keep the conversation flowing, you can tweet and find out what other people are tweeting about the building and current promotions.
