Powered Lavaliere or Small Microphone

["losangelesprofessor" losangelesprofessor]

I want to use my Nokia N95 cell phone to record--it's with me always,
even if it is not the best recorder. In any case, I'd like to use an
external microphone--there's no end of advice on the web about how to
do this, although I have yet to make it work.

However, my main concern is acquiring a small microphone, probably a
tie tack or lavaliere, that is self powered. It will be wired, not
wireless. Can you recommend a good one?

Martin Krieger