Why yes, I have been looking for an excuse to put my iPhone in my mouth, Harmonica iPhone App guy! The Harmonica iPhone App — silly pitches aside — is a totally hilarious new addition to the App Store, and sort of unbelievable.
To make music out of your "harmonica" you just put your phone up to your mouth and move it around as you (sort of) would a real harmonica. You don't have to slobber on it. In fact, don't. It just needs to be near your mouth, so no funny business.
Make some music, entertain some people, have a new party shtick! Just $1 for your jazzy pleasure.