Tim Eriksen, an alt-folk (and sometimes punk) Massachusetts musician sings and plays Amazing Grace on the banjo:
If you want to hear and see more, here's Eriksen singing in the snow and playing fiddle amidst the sounds of crickets and laughing chidren.
Thanks to Tony (aka "Bede") for the link and introduction to this music by a former member of the band Cordelia's Dad. You may have heard Eriksen performing "Am I Born to Die?" from the Cold Mountain soundtrack.