Google Maps Navigation is now available to devices running Android 1.6 (Donut) and higher, such as the T-Mobile myTouch 3G and the G1. Google Maps Navigation is an internet-connected GPS system with voice guidance and automatic rerouting, all running on your mobile phone. This release also includes new Layers feature, which lets you overlay geographical information on ;map. View My Maps, transit lines, Wikipedia articles about places, and more. If you’ve a phone running Android 1.6, you can download an updated version of Google Maps from Android Market to use Navigation. Google Maps Navigation is in beta and is currently available in the United States.