Gary's blog mentioned the winner of a Microsoft VirtualEarth contest which is a company called MapStats. Yes, it is a cool, but who said it was the first? Urchin's Geo Map Overlay has been around a long time ago. I use it all the time and it's fabulous. Here is a sample:
Urchin defines it as "GeoTargeting: Discover at a glance where your best customers are located. Find out where your visitors come from and which markets are the most lucrative. Compare conversion metrics and visitor value for just about any geographic location." You may watch the tour with Chapter 7 of the DEMO on Geo Targeting to learn more.
Please correct me if I'm wrong, but I don't think MapStats gets bragging rights as the first to deploy such function.
Forum discussion at Search Engine Watch Forums.