Loathe them all you like (except when it's midnight; you've had a few drinks, and have 20 minutes to kill before your bus comes), McDonalds has done good with this billboard that lets iPhone users play Pong. It's that simple.
Wandering Swedes don't have to download an app to play the game, either - they just have to go to Picknplay.se on the iPhone's browser, and thanks to GPS, you'll be hooked up to the billboard as soon as it's free. There are even rewards! If you can play for 30 seconds without being killed, you receive a coupon for something free and edible (well, mostly) at Maccy Ds. [CNet]