Lets not get lost today!
Know how long your trip will take and how much it will cost before ever getting behind the wheel. From calculating your fuel costs based on your driving style and current cost of fuel, to specifying how many stops you want to make and when, customize maps and routes based on your own driving preferences. Use the Optimize Routes and Stops feature to find the most efficient route to reach multiple destinations.
Sounds good, doesn't? I use this toy almost every day.
http://www.microsoft.com/streets/docs/WatchVideo.html