Yea Mark, there are that fit the Yo Yo Ma, James Tayolr mold.
That was from an album called Appalachian Journey that I picked up some years ago. It was put out by Yo Yo Ma, Edgar Meyer & Mark O'Connor. There are two vocal tunes. That one with JT and another called Slumber My Darling with Alison Krauss. I put the Krauss song on a "Lullaby" CD for my Grandson and he loves it.
Ma, Meyer & O'Connor also put out another one that I think I got from emusic called Appalachian Waltz. I then got a bit more classical when I downloaded Aaron Copeland's "Appalachian Spring" which is a really great score.
Back to James Taylor, do a search on Yo Yo Ma & James Taylor, they've done some others. A really good interview and their version of "Here comes the Sun":
http://www.youtube.com/watch?v=KAkoYcfDmrk
JP