A guy named Jason Feifer, who's the editor of "Entrepreneur" magazine, just launched the website Crossing.us. You can type in any name or two, and the site will tell you how many streets have those names, and if they ever intersect.
If this guy were REALLY a good entrepreneur, then his site would let you book a flight to where that intersection is . . . and sell you tools to help you steal the street signs . . . but for now, you'll have to do all of that on your own.