I think there are pleanty of companies which store customer informations in some sort of a database or even in a plain excel-sheet to stay a little organized in their daily work. This could be convenient for them but I would love to see some maps, where are my customers from and where are dense areas of origin. This could increase my impressions using advertisement or I can adress customers with special offers that rely on their adress.
In the next days I will create a little tool that will automatically scan your customer database, transform the the results in both: a shape-file for a GIS-application and a KMZ-file for googlemaps. This means you can pinpoint your customers worldwide.