Inedible Software has released Air Guitar, a new motion-based music app for the iPhone and iPod touch. Started by two Stanford University students, Inedible’s Air Guitar began as a final project for the school’s iPhone Application Programming class. The app displays an onscreen fretboard, letting the user physically strum to create music, with the ability to tilt for whammy bar effects. Users can strum harder to play louder, pick from…