Microsoft has just released thier Street-Side product in preview mode. It’s a pretty nifty implementation of AJAX technology and mapping. You can type in an address and get a split screen view of the map of the area, and the view you’d see if you were in a race car, sports car, or walking (I like the sports car best :). You can then use the arrow keys to “drive” around the city with the view updating as you go! Right now the system only features Seattle and San Francisco. Having driven around San Fran at time or two, I can say it’s fun to come up on a some serious gridlock and just plow right through it!