Google Latitude is a new app from Google that lets you seamlessly share your location with your friends in real time on a map. There are also many privacy controls to ensure the right people can see your location. From the app, you can chat with your friends via Gtalk, or send them an SMS or an email. The service is currently available Google Maps on Android, Blackberry, Windows Mobile, S60, and will soon be available on the iPhone. Now Google just needs to make a Facebook app out of this.