I ran across this post on TechCrunch:
Someone told me last week that National Cheeseburger Day was on the way. As far as I’m concerned, every single day could be National Cheeseburger Day, because they’re yummy. Tomorrow is the official day, and foursquare has teamed up with KRAFT to generate some charitable giving based on your potential eating habits.
It’s all quite simple: check-in at Five Guys Burgers and Fries, and KRAFT will donate the equivalent to Feeding America.