Here's what my son sent me about a great pickup system. The neumanns he speaks about are high $$$ mics.
here ya go. the site is in flash.
click on this
and go to the second yellow link down the page. a box will pop playing
the clip recorded with neumanns. in the box you can click to listen to
either the ibeam pickup system or the neumanns. its pretty cool
here is the description of the pickup system.
if you go to the "hear audio samples" you can download the whole keaggy
track in mp3. its pretty good.