One of the more interesting gadgets I saw today was the Sonic Walk from Creanovative.  The Sonic Walk is a light weight harness that you wear over your shoulders that has two speakers.  I tried one of their water resistant models on the show floor and was pleasantly surprised by the quality and volume of the sound that filled my immediate area.  The speakers are located just in front of the shoulders on each side and are connected to a source through wires embedded in the vest.  The Sonic Walk comes in a variety of models that include different pouches and some even have support for a water bladder. Currently,  the Sonic Walk is available for order online.  I could see obnoxious Segway gliders easily adopting this into their gadget inventory.