The new buzz in social networking is focusing on the question: Where are you? Services such as Foursquare, Gowalla and Rummble allow you to “check in” at bars, restaurants, clubs and even offices and railway stations so that your friends know where you are. You can use services on your mobile phone to find places that have been recommended by your friends, or by strangers.
The big sell however for business is that in the very near future companies will be able to target you with advertising and promotional campaigns based on your real-time location. You could be walking past a particular restaurant, use the foursquare app on your iPhone to “check-in” at that location and within seconds you receive discount offers to entice your through the door.
(submitted by Simon)