I read about it on Yahoo back in 2000 or 2001. The article stated that a new game or sport had evolved using GPS. It sounded interesting, but I didn't get into it until my wife, son, and I went with some friends this past fall geocaching in Indiana. They found their 100th while we were with them. We had a great time and now we have our own GPSr and are hiking into the woods, parks, and cemeteries whenever we can. We found the few we have near where we live, so now we need to make the time to do some traveling.