My officemate was looking up something about her Apple computer, and stumbled across an ad for the iPod Shuffle boldly declaring "Enjoy Uncertainty!"
Which immediately raised the question: WTF is an "iPod Shuffle?"
Well, apparently it's an iPod where Apple has engineered out the display. The only display element it has is a little green power LED.
In other words, it plays random music and you can't know what's next because it has no way to tell you. (Well, that's not strictly true - you can tell it to play the playlist straight through, so you can follow along.)