For those of you who like to view properties and their surrounding area from your computer (and see many places around the world) try mapstreetview.com
Try it out with your home address. This is a bit different from showmystreet.com and gives a nice neighborhood view whereas showmystreet gives better commercial building views (multi-story). Google Earth is still best for overhead views and views away from the street.
With a property profile from Dennis and these tools you can do a pretty fine quick CMA without leaving your office.