Now we can see Google Maps with a street level view
Here the intro to the service:
http://maps.google.com/help/maps/streetview/

an example (Time Square, NY)
http://maps.google.com/maps?f=q&hl=en&q=&layer=c&cbll=40.75859,-73.98509&cbp=1,16.91913183279746,,0,5&ie=UTF8&om=1&ll=40.760464,-73.984423&spn=0.003746,0.009613&z=17&panoid=v2OYm_eOSnWeujyvpmdZOw

You can use the control panel on the left or drag & drop to turn. Doble click to zoom in. Clicking on the arrows it’s possible to follow the rout of the car.

Zoom out until you see all the US and click on the camera to see other places.

Until now the service is available only in the US, but many Google cars were seen all around Europe.

How is it made? Very very simple: with a car with a camera on its top, making pics every n seconds (watching the pics I suppose about 5 secs)

http://googlified.com/files/immersive-car.jpg