I'd love to help but don't have the time. I just wanted to say as soon as I saw the page, I thought the same thing. If the author made their data available, it

I'd love to help but don't have the time. I just wanted to say as soon as I saw the page, I thought the same thing. If the author made their data available, it should be reasonably easy to restructure the data a bit then use something like OpenHeatMap (www.openheatmap.com) to create layers on top of Google Maps. EDIT: Another idea -- if the author made their data available in shapefiles, it'd be easy to use with any mapping program.