My penny's worth!
I am the audio/musician in the family, while one of my brothers
is into the Visual Arts. He videos's weddings, Bar mitzvah's,dances
etc,etc,etc. He uses 4 digital cameras but did not like the mic's on each. He purchased 2, SONY ECM-44B Omni-directional Lavalier mics. Since a lot of what he video's contain spoken & musical audio,(including documentary work) the ECM's were perfect for his use. They have a freq response of 40-20,000 hz, are small and
lightwieght and runs on a single "AA" battery. they can be camera mounted and/or clip mounted and has a small windscreen
and cute,little shockmount with adapter to control vibrations when he's moving the cameras around!