I'm not sure what system Greg Carmichael is using in this youtube clip - looks like a magnetic soundhole pick-up combined with a small external mic. I still don't care for the sound, albeit this is a compressed-to-death youtube clip.
http://www.youtube.com/watch?v=hyMN--JUfs8
Love the song, "Wind of Change". Just finished learning it...still needs some serious polishing.
Fred