I've had my eye on Looxcie (no pun intended) for a while, but the previous model was a bit too bulky. It's like a Bluetooth earpiece on steroids -- not only does it work as a headset, but it has a wireless Bluetooth video camera so you can play Borg, record, and even stream your vision to the masses. There are a number of situations where wearing one would make sense... traveling, for instance, or covering a tradeshow, press conference, or sporting event. I have considered wearing one during CES or MacWorld, in fact, so I could live-blog to our readers!
But there's good news. The new model is streamlined and would fit right in with other BT headsets. It's slightly longer, as to accommodate the camera, which points straight out along your sight line. The device captures 5 to 10 hours of video, depending on the model, and is available at http://looxcie.com/store as well as from several online retailers.
There is a companion app, both for broadcasting and viewing remotely. Looxcie is compatible with iOS 4.2.6+ devices and Android 2.1+ devices. There are a plethora of mounts (car, bike, baseball cap, tripod, etc.) and lenses, including fisheye, telephoto and wide angle.