An ingenious DIYer noticed that the second generation iPod Shuffle and the Apple Remote have a similar shape. So similar that the two devices could be merged together with some crafty electronic finagling.
When headphones are connected to the Shuffle / Remote mash-up device, the gadget works as the music player. Without headphones, the device carries the features of an Apple Remote. You won’t be saving too much room by eliminating one or the other, but you will have one less toy to worry about losing. That damn Apple Remote has a way of disappearing.