Today’s MacZOT is the absolutely beautiful world-as-wallpaper app, EarthDesk. Also available for Windows, but you won’t get the special price of $12.95 (UP $19.95). It updates itself online and renders moonlight and daylight taking into account reflectivity and live cloud cover information. I believe that means what you see is pretty much what you might get from space. If there are any tornados going on at the time, you’ll see them too.
I’m thinking about it… but I might wait till I get my 20″ iMac. It’s probably not the same on a 1024×768 laptop screen.