Heard about AR? No? Here's how it works. You land in a new town/business area. Load Layar. It fires up your camera. You point it at nearby businesses, and select a Layer to overlay over the live image. Layers will put icons/push pins on local kinds of businesses, gas stations, bars, book stores, etc. There are dozens of layers that will show you, in real time, what's around you, and how far away it is from you. You can even overlay Twitter users who are nearby, FourSquare users, and more. New layers come out often; keep up to date!