If anyone has gone to Google lately they have already probably seen the advertising for this. There is a new mapping technology that uses actual satellite imagery instead of drawn roads and it is amazingly executed. The name of the software is Keyhole, and it is a technology that was used during the war to show different aerial flybys of different cities in Iraq. I highly suggest you try the software...it is simply amazing. A word of warning though. You need a fast processor and an even faster internet connection. It wouldn't even be worth using if you did not have broadband.
Keyhole software