Google today launched its popular Google Maps Navigation (beta) for older devices that use Android OS version 1.6 or higher. It debuted as a free feature on Android 2.0 (Droid) handsets a few weeks ago and was received with much enthusiasm. Now devices such as the T-Mobile myTouch 3G and the G1 will be able to use the Internet-connected navigation system that offers voice-based guidance and automatic routing. “This release also includes the new Layers feature, which lets you overlay geographical information on the map. View My Maps, transit lines, Wikipedia articles about places, and more,” Google notes on its blog. Since I don’t drive, this system isn’t of much use to me. But I have seen some friends use it, and it’s pretty darn good — enough so to cause a long-term migraine for others in the dedicated GPS business. (Related post: “With Maps Navigation, Google Fires Another Shot at Carriers”)