I've been looking forward to this for a while... and it does not disappoint. Favorite so far, "Devil Got My Woman", a Skip James song from 1931. That's one of the more ethereal tracks here, but the more rocking stuff is great too... track 2, "Little By Little", is a great blues song in the ABB tradition.
They'll have it streaming on NPR's All Songs Considered until January 18, when the disc will be available for purchase. Highly recommended.
Link: Gregg Allman: Low Country Blues (NPR First Listen)
Here's Jim Fusili's WSJ article about the making of this album:
Allman's Latest Blues Were a Source of Hope