Is Google crossing the privacy line? Some are saying so, and Google Earth is still a controversy for those who value privacy of the home. Google’s new mobile mapping app Latitude allows users to take advantage of GPS technology to pull up friends’ locations whenever they’re phones are turned on. The application, bundled in with the newest version of Google Maps, is currently accessible on the Android-powered G1 phone, most color BlackBerry’s and many Windows Mobile smart phones and will soon be available for the iPhone and iPod Touch. Location updates made on Latitude are then communicated to Google Talk and Gmail. The app is opt in – that is, you’ll have to agree to share your location, too. This way people can mutually spy on each other.