'Check-in’ triggered vending machine

The MLB Fan Cave store in New York featured a vending machine that dispensed baseballs to people who checked into the storefront display using Foursquare.

Foursquare-enabled ad dispenses dog food

Foursquare has finally made itself useful—to non-humans, anyway. A pet-food company in Germany put up a billboard urging you to check in at the location on Foursquare—and in return, it spits out some dog food for your pooch to nosh on.
Via: adweek

McDonald's exclusive content for people checking in on facebook places

TBWA’s Digital Arts team created a campaign that rewarded people with exclusive digital content if they checked-in to McCafe’s using Facebook Places or Foursquare.  Content changed every day and included animations, film and music.
via: mad-blog