From My Customers Are Different -- "If you are lucky enough to have a point of sale system that captures this information electronically, you can export an electronic version into a Microsoft product called MapPoint. MapPoint allows you to take customer data and import it for geographic references. If you wish, you can even use different color/size pins to show different levels of customer purchases. I use “red is hot, blue is not”. It also allows you run other data points on geographic areas and to drill down into the map for easier use.. For more information go to: http://www.microsoft.com/mappoint."
Read more at -- Birds of a Feather Flock Together!