
Ah, Sweden. The land of Akvavit, crayfish parties and billboards that respond to your iPhone.
You heard that right. McDonald's, not exactly a hotbed of Swedish cuisine but a popular place to eat nonetheless, has installed an interactive billboard in Stockholm. Enter a special URL, and you can play pong on the billboard with your iPhone. If you can survive for 30 seconds in the game, you get a digital coupon for some treats at Mickey D's.
What's brilliant is that you don't need to download an app to play the game - just enter picknplay.se into a browser, and a web app checks your location to verify that you're near the billboard. You knew there was a good reason to keep Location Services turned on all the time...
Another game on the same billboard has you snap a photo of a McTreat with a phone (not necessarily an iPhone) to get a free goodie at a local McDonald's.
via TUAW