Go to the Merlefest web site for the full list. Here are some:
Doc Watson
Richard Watson
Susana and Timmy Abell
The Alberti Flea Circus
Angel Band
Banknotes
Buffalo Barfield
Bearfoot
BeauSoleil
Rory Block
Blue Highway
Roy Book Binder
Laura Boosinger
Bob Bovee and Gail Heil
Broken Wire
David Bromberg
Sam Bush
Cadillac Sky
The Carolina Chocolate Drops
The Circuit Riders
Clack Mountain String Band
T Michael Coleman
The John Cowan Band
Dailey and Vincent
The Dixie Beeliners
Donna The Buffalo
Pat Donohue
Robert Dotson
The Duhks