Facebook wants to know "What's on your mind?" Twitter asks "What's happening?" But that's getting old already. The burning question for the next wave of social networking is "Where are you?"--and services like Foursquare, Gowalla, Brightkite, and Loopt want you to use your smartphone to answer it.
geolocation - News, Features, and Slideshows
Twitter's upcoming geolocation feature is a nifty idea -- but mainly in theory. A quick look at the applications of Twitter geolocation could give those close to you, and not only those people, some ideas of taking advantage of the service to your detriment.
Twitter gets even better with the introduction of a new opt-in geolocation feature that will allow you to identify where you are tweeting from. Attaching your location to a tweet is nothing new to smartphone owners, but having the location-aware feature baked into Twitter opens the floodgates to hosts of cool new Twitter tricks.
I went on vacation recently, and during that time I realized how dependent I have become on GPS applications to find what I am looking for. GPS devices maximise my vacation time by letting me drive less, since by using them, I never get lost. And driving less means I'm living a greener life, too.