Lineup (Subject to change): Glen Hansard, Patti Smith, Billy Gibbons (ZZ Top), Keb' Mo', Rosanne Cash, The Mountain Goats, Marc Cohn, Shawn Colvin, Raul Malo, Nicole Atkins, Marc Roberge (O.A.R.), Oliver Wood (The Wood Brothers), Joan Osborne, Deva Mahal, Martin Sexton, Joseph Arthur, Bettye Lavette, Ron Pope, Son Little