Check out the new "Street View" feature for Google maps. It allows you to walk around San Francisco, New York, Las Vegas, Denver and Miami with a 360 degree view.

http://maps.google.com/maps

I just drove by the advertising agency office where I used to work in San Franscisco, then headed across the Golden Gate Bridge towards my former Marin County home. No bridge tolls. No $3.50 gallon gas. No traffic. No fog. No cold San Francisco summer weather. This is just too much fun!!! I felt like a virtual tourist.

 If you are selling real estate in any of the cities covered by this neat tool, maybe you can find a way to use it.