Rachel at Instructables shows you how to talk to the hand with her bluetooth phone headset glove:

This shows how I took apart a bluetooth headset and sewed it into a glove, so that I can talk on the phone just by holding my hand up to my head as if I were pretending to talk on the phone! But I really am! I only used a very basic set of tools for this – soldering iron, scissors, needle and thread, wire cutters, and my trusty Leatherman.