StreetView is a pretty amazing innovation in GoogleMap technology. It lets you see zoomable 360 degree panoramic views of a location. I'd imagine some folks are pretty excited about this, particularly if they happened to be in one of the images. (Or if their car was captured, perhaps) I wonder what mashups people will make with this. Here's hoping we see more cities added... as of now, I see San Francisco, Las Vegas, Denver, and New York.
You can also link to these StreetViews, for example, here is the Luxor casino in Las Vegas.