Google "Street View"
A new feature on their map system. Click on a street outlined in blue, and you're there. You can see what you would see if you were there. Although the views are, of course, not "live," people are still seeing a lot of things they didn't think would be on the internet, including their own houses, faces, and license plates.
While only a few parts of the country work with this so far, it's unnerving how MANY streets in those areas are outlined in blue.
Somehow, this doesn't work on my machine. The "view" seems to come out just solid black for me.