This would make me want to buy an iPhone:

Update: Apparently Apple didn't object to fart-based apps, and one--iFart Mobile (seriously)--is reported to be pulling in over $10,000 per day.

This isn't the best seller, but I love the tagline:

Pull My Finger ($0.99): "Why must I always carry a phone, iPod, AND electric fart machine?"

Better yet, I have a new euphemism:

iPhone developers have discovered that there's big money to be made in - as Mark Twain once described it - clearing one's nether throat.