Amongst others: Pearl Jam
Metallica
Jack Johnson
Robert Plant and Alison Krauss featuring T Bone Burnett
My Morning Jacket
The Allman Brothers Band
The Raconteurs
Willie Nelson
Death Cab for Cutie
B.B. King
Sigur Ros
Levon Helm and the Ramble on the Road
Ben Folds
Umphrey's McGee
Iron & Wine
Derek Trucks & Susan Tedeschi Soul Stew Revival
Gogol Bordello
Broken Social Scene
Robert Randolph's Revival
Ozomatli
Solomon Burke
Drive-By Truckers
Aimee Mann
Minus the Bear
Jakob Dylan
Vampire Weekend
Little Feat
Mason Jennings
Probably 4 or 5 incarnations and/or tributes of the Greatful Dead, and a band called "Lez Zeppelin". Maybe not the powerhouse they had last year with The Police, but interesting nonetheless.