You could enjoy that Big Mac in the peace and artery-clogging quiet of your local McDonald's, or you could just catch the next flight to Stockholm, where Ronald apparently serves his meals with a side of interactive, outdoor gaming. It's all part of something called Pick n' Play -- a new (and pretty ingenious) ad campaign that invites pedestrians to play a game of Pong on a giant Mickey D's billboard, using only their smartphones. All you have to do is stand in front of the display, log on to Pick n' Play's site from your handheld, and wait for your phone to verify your location. From there, you'll have t
