I’ve been using Foursquare (www.foursquare.com) a lot lately. Fun little location-based app, works on your smartphone. The basic idea is that the app uses the GPS chip in your phone to pinpoint your location. It then presents nearby landmarks that you can ‘check in’ to, earning points along the way.
I’m still trying to figure out the educational application. So far it’s just for fun.
Do you use Foursquare or similar location-based apps? If so, what has your experience been?