Earlier this afternoon, Google pushed Maps v5.7 to the Android Market. The app's Transit Navigation (beta) feature brings GPS stop-by-stop nav to public transit systems in over 400 cities around the world, helping you find the subway or bus stop, then letting you know exactly when to get off as you ride. There are obvious benefits to using this in a foreign city, where alert-enabled (English!) directions could potentially save you hours of frustration. We left our office to brave the daylight in NYC, walking a block to the nearest subway station en-route to T
