Here’s a pretty sweet little device: The Tom Tom GO 720. This handheld GPS device allows users to edit maps from its 4.3″ LCD touchscreen. You can add your favorite locations, enter details about roads under construction or correct any inaccuracies you run across during your travels. Other users can download your map fixes - and you can download theirs. Mount it in your car or pop it in your pocket when you’re on the go.