Probably the best use for Street View to date, has been as a means of identifying places you've never been. Though the street numbering is approximate, Street View can be used to check out what someone's apartment building or office looks like before you visit -- making it easier to find in the real world. But the process is tedious and involves manually clicking down a street until you find the portion you want.

By mashing up Street View and directions, Google has greatly simplified the process of using its street level panoramas to find specific locations. Any point-to-point directions covering an area supported by Street View will have a camera icon next to each step when Street View is on. Clicking on the icon will launch a Street View window, and the directions can be followed step by step within the street-level view.

That would have come in handy last weekend when directions I got from Google told me to take a "slight left" which was really more of a 90 degree turn. Had I been able to check out the step on Street View first there wouldn't have been any surprises.