Sounds cool - I've been playing with Google Maps a bit and am working on possibly integrating it into the site here. Maybe we can do something together?
I am currently planning to get a project going in which i'd create a KML file for Qatar which contains landmarks like shopping malls, shops, building, restaurants, etc that people can download and use when they decide to use Google Earth. But since I started, I haven't found that much time to update it since I've only spent about an hour updating it. I'll probably update it once I finish relocating to http://www.lifeonthespot.com . But if you want to see a glimpse of my KML file, you can download it from here:
Google Earth KML file
You can right-click and use "Save As" and make sure that you open it from google Earth or make sure that the KML file is associated with Google Earth if you choose to open it directly.