This...is...AWESOME! I've been looking around for some decent software to make 3D model mock ups of my house and stuff. Architecture has been a hobby and interest of mine for years, but it's been near impossible to find an entry-level CAD program for free, or at least for ultra-cheap.
Thank you, Guru!
"At the end of every hard-earned day, people find some reason to believe." -- Bruce Springsteen
Google Earth Hacks has a page with myriad .kml files that you can download and add to Google Earth that updates the imagery on your PC. Since you can click them on and off, you can go back and forth between before and after.