iSpinB is classical spin the bottle game which uses technology of modern iPhone 3GS devices.
To add players simply point iPhone at them and press the button. When you are ready press the start game button. Spin the bottle by swiping it with your fingers in either direction. iSpinB will tell you, whose turn it is to ask or answer the question. Because of iPhone's built in compass application will always accurately display position of other players regardless of the current device orientation.
Have fun using the application ;)