While most of the apps making use of the iPhone 4's gyroscope have centered around augmented reality, here's one doing something different. Gyro Air Drums is an app that supposedly lets you use your iPhone as a "virtual drumstick," waving and tapping it on a virtual drum. You can move your iPhone in a 300 degree rotation in real life, hitting various drums on upper or lower levels. And when you move the iPhone, your screen will rotate along with the move
