Having recently “discovered” this sport/game, our family is hooked! We’ve had lots of fun over the last few weeks hunting for geocaches in our neighbourhood. Right now we’re using the Geocaching iPhone app. It works pretty well, and it’s great to be able to use it on the fly for impromptu geocaching outings. However, the battery drain is pretty severe. We’re now looking for a handheld GPSr unit.
I think geocaching is going to add a lot to bicycling and hiking outings. Our kids hate to “go for a hike” but even in the cold weather the’ll quickly don their boots and mitts to go treasure hunting!