Now you and your friends can play “Where in the World Is Carmen Sandiego?” with Google’s new mobile technology called “Latitude,” but you, or they — all of you, as a matter of fact — can be Carmen. All of your movements can be geographically tracked through cell tower signals, and everyone you let in on the game can potentially be your own personal stalker, following you by smartphone or regular old PC. Google’s idea is that friends want to let friends know where they are, so they can link up more easily.