Device arrives at Location X. This offers the largest number of possibilities, but there are still only so many pseudo-geocaching games, walking tours and socia

Device arrives at Location X. This offers the largest number of possibilities, but there are still only so many pseudo-geocaching games, walking tours and social-network things you can do without flooding the app market with a bunch of essentially-duplicate applications. These apps would at least have a modicum of usefulness, unlike the plethora of movie quote soundboard apps.