A riding buddy of mine just got a new bluetooth headset from Cingular called the Jawbone made by Aliph. It's supposed to have a new, military grade noise suppression technology that can distinguish speech from other sounds and even speech in the background and eliminate sounds other than the wearer's speech. It sounds like it'd be quite a nice deal for use on a bike for those of us who either don't wear helmets or wear half helmets only. I'm curious to know if anyone has tried one yet and what their thoughts were. Thanks!