I’m a big fan and user of Instagram on iOS. Here’s a nice implementation of the Instagram API along with google Maps. About the app from the developers… InstaEarth is a way to discover and view beautiful Instagram photography taken around the world. View your feed, friends’ feeds, popular photos, or navigate the map and explore the world through the eyes of Instagrammers everywhere. Check it out at http://instaearth.me
Instaearth – Instagram photos on a map
Originally uploaded by @gletham GIS, Social, Mobile Tech Images