Google have added panoramas to their Google Maps services with the launch today of Street View. Available for Silicon Valley, Las Vegas, Miami, Denver and New York new areas will be added over the coming months. The YouTube movie below from Google explains the concept:
Captured using vehicle based panoramic cameras linked to a GPS the innovative nature of the panoramic views is the way in which the interface has been developed. The track of the next available view floats in ‘3D’ space within the panorama allowing a seamless way to navigate between scenes.
You can view the Street View direct from here, to be honest you cannot fail to be impressed.