The Piss Screen
The interestingly named Piss Screen is from 2007, but I only heard about it recently. Aimed at encouraging drunk people to take a taxi instead of drive home, Piss Screen lets men play a car racing game, like Need for Speed, using their wee, and just their wee. There's a video further down.
The idea is that if you can't control the car on screen, you can't control your own car, and therefore should give Frankfurt Taxi Services a call.
Thankfully they didn't come up with a women's version. God only knows the queues are long enough as it is.