Sony has just filled a patent for a new type of "human body communication system and communication device" that uses your body to wirelessly transmit sound from an audio source to a pair of regular headphones.
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iRebel Jackets (coming in January 2007) from Polartec feature an interior iPod pocket which connects your iPod to soft switch controls on the sleeve. Okay, but they still look like Star Trek uniforms and the iPod isn't quite up there with the Tricorder - yet!
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