I look so I can hear blog had a link to this concept aid earlier this month. The idea was developed by Design Affairs studio in Germany. According to them, you should "Show what you got, don't make a fuzz about your problem. Be individual, be cool, be yourself."
I have to admit if I saw somebody walking down the street with one or two of these they'd probably get a second glance. Only the wire going into the ear betrays a hint of its true purpose. These may not be for me, but if I saw somebody with one, I'd think they were awesome.