I can't believe people aren't talking about this as I find it very interesting http://earth.google.com/ Contains a ton of GIS inforamtion. You can litterally see incredible details of the earth. Restruants and shops are marked, even webcams that cover intersections are linked. You can view everything from your house, to the green zone in Iraq, to temples in Japan. First thing you should do after installing. Type in your address, it'll fly you right there. Maybe turn on 3d builings tilt the camera so its facing the horizon and take a stroll down a london street.