Handsfree bone-conduction headset mike

It clearly is open season on cellphone headsets in Japan now that the November ban on cellphoning while driving is approaching. Among the bunch is the slightly unusual tel-tel-bone (Japanese product law states that all consumer goods must have a pun somewhere in their names, if you were wondering), a bone-conduction headest mike. The selling point is that since you don't have anything covering your ears it's still possible to hear what's going on around while you drive, though we suspect that the risk of people pointing and laughing at the boxlike protrusions stuck to the side of your head still exists.