Checking in on Facebook is addictive, and the addiction for me is certainly fueled by getting badges. My most proud badge is my “Jet Setter” badge, which is awarded after a bunch of checkins at airports. Although users can get each badge only once, Foursquare has recently added the ability to “level up” on a badge, as a reward for even more checkins. I’m slowly leveling up on my Jet Setter badge – and lots of other people are too. Here’s a cool infographic from FourSquare depicting checkins to major transportation hubs, and serves to map out the most common flight routes of 4sq users…
