Levi Wallach of Twelve Black Code Monkeys made a good point in a comment he posted to End User Awareness of Bluetooth on the Rise According to Survey. Levi said:

I would have to agree with you. I recently went out with some friends for dinner who are not techie at all and they knew what the bluetooth headset was that I was wearing, although I'm not sure all of them knew the actual term "bluetooth."

Bluetooth headsets like the Motorola HS810 are popping up more and more, and people often ask, "What's that?". After you give the headset's elevator pitch, they often ask, "What's Bluetooth?"

Bluetooth has such an odd name that it's hard for a lot of people to forget once they've heard it. Of course, I talk about Bluetooth so much that I forget that headsets are the things people see early adopters using the most. Of course the headsets are the key drivers of awareness of this technology.