This app was removed from the App Store.
iOS iPhone Entertainment
Wave Writer is a scrolling banner application with a twist. Scrolling speed is matched to the speed of your phone as you wave. The effect is that of stationary text in space exposed by the phone ™.
Useful in social situations like bars, parties, concerts or any time you need to communicate visually: hail a cab, at the airport, send message to someone in another car, send requests to DJs, etc.