After three days of lines, sore feet and a crushing mass of rage-inducing humanity, my return from the international Consumer Electronics Show (CES) in Las Vegas is invariably greeted with one question:"What's the coolest thing you saw?" This year, it came from a small, three-person company. t's called Jook, and it has developed a chip that can be cheaply added to any MP3 player accessory -- likely headphones -- that when plugged into the device will broadcast music played on the device to other Jook-enabled users. (Billboard)