I’ve been playing with an interesting service recently called Waze. It’s a hybrid between social networking, location-based services and a mapping application. Once you sign up, you can help Waze map the world around you, then share status updates on the roads you’re travelling on with other users.
All you need to do is to start up Waze on your smart phone and let it track your location. It figures out your speed from your GPS updates and lets people on the same route know when you’re approaching slow moving traffic. You also earn points by helping them map different points and roads.