Here's an unusual wedding present - a puzzle box that won't open until
> it is taken to a certain location in the world!. The Reverse Geocache
> Puzzle is based on an Arduino microcontroller.http://arduiniana.org/proje=cts/the-reverse-geo-cache-puzzle/
Very interesting idea. The only place where I fault him is in his use of an Arduino, which is the AOL of embedded development (in the Usenet sense of the phrase).