Creating a visual IP address map isn't a perfect location,
so don't expect to see your home address show up. Instead,
they usually do a pretty good job of tracking the IP address
back to your local ISP. Interesting product none the less.
FYI, several months ago Joe Danziger wrote an article for CFDJ about how to use the Google Maps API to visualize where your site visitors are coming from based on IP Addresses. It's a good article introducing the technique.