These are supposedly the "newest in innovative listening technology". Now I don't know much about new and innovative listening technology but this actually sounds pretty good: non-earbud headphones that bounce sound off your outer ear instead of shooting it into your inner-ear to produce more realistic sound. It also creates virtual surround sound (some guy hits a drum to the far left, it sounds to the far left, behind you, in front, above, etc.). I don't own 'em, considering buying them though. They're around $129 and a review said they were better than his $300 dollar pair from bose, so that is definately a good thing.
site at: http://www.ultrasone.com/icans/