I was out searching for something of this nature and was excited to come across a site that was rating solar potential, using Google maps and accessing many different databases to provide info on cost-rebates and so forth. But it seems the website may have been pulled in late November of 2011. I'm attempting to contact the developer to find out why he took it down. Was it not being utilitzed, too much to upkeep or did someone give him money for his ideas or did competition pay him to pull it down? I don't know. It sounds like a phenomenal site.