These FlOw wireless speakers by David Boyce are designed to be used with the Apple iPod to promote social behavior. FlOw reacts to movement, allowing you to rediscover your music as you set the mood by simply shaking one of the speakers.
Each of the flOw wireless speakers is surrounded by a soft, silicone jacket. Squeezing a speaker activates the gesture controls, while accelerometers interpret your movement and select a mood of music to match.
Implications - FlOw Wireless Speakers integrate the natural movement of shaking into the user-experience: the speakers get the playlist to shuffle when they have been shaken. Recently I have seen a few music-based innovations but this one definitely stands out.