Pirata Boat Race is a computer game that uses your iPhone as a Wiimote. As you can see, it's also a sure way to look like a moron, but that's only half the fun of it.
It's a very simple game, but it uses a clever way to pair your iPhone with each ship.
First, download the free Boat Remote. Then go to the Pirata Boat Race page. When you start the game, you will need to choose the ship you want to control by scanning a screen QR code with your iPhone. Then, you only need to row, row, row your boat, frenziedly against the other team until one of you wins.
I wish more companies used accelerometer-based smartphones to interact with computer or console games via Bluetooth, either completely or partially, using them as HUDs or maps. That would be real fun. [Oh Gizmo]