] Blame it on geocaching, an Internet-based hide-and-seek
] game that has, just three years after its invention, been
] played by an estimated 250,000 people around the world.
] Roughly 15,000 play in any given week, and the number has
] doubled about every six months

Geocaching getting some more notice.

'Geocaching' buccaneers pursue hidden bounty throughout Bay Area as GPS-based game catches on