Below are some screen shots of the Mapawatt map tool that we are almost finished developing.
The house icons indicate registered users. Different color houses represent different types of homes - i.e. blue for townhome, red for single family, light blue for apartment, etc. My home is represented by the dark blue icon. Let's say I want to compare with my friend living in Peachtree City, GA. I would find his house and then click on it (the mouse click is represented by the green circle).