In order of, well, importance (in my crowded head, anyway), here goes: Tom Petty and the Heartbreakers, Van Morrison, Willie Nelson, Massive Attack, String Cheese Incident, Ben Harper and the Innocent Criminals, the Flaming Lips, Jose Gonzales, John Mayer, the Raconteurs, the Shins, Ween, Los Lonely Boys, Gnarls Barkley, Cat Power and the Memphis Rhythm Band, Secret Machines, Gomez, Kathleen Edwards, Wolf Parade, Jack Ingram, Sparklehorse, Thievery Corporation, Ben Kweller, G. Love and Special Sauce, Matisyahu, Damien Rice, Kings of Leon, Iron & Wine, Kasey Chambers, Aimee Mann, Nickel Creek, Damian Marley, Calexico, the New Pornographers, Son Volt, Guster, Galactic, KT Tunstall, Ted Leo and the Pharmacists, Centro-matic, Marah, Nada Surf, I Love You But I've Chosen Darkness..., Okkervil River, the Black Angels, Explosions in the Sky, Sara Hickman, Trish Murphy, Asleep at the Wheel and about 50 others acts (among them the South Austin Jug Band and the Palm Elementary School Choir) who're there to fill space and kill time while you're reloading your one-hitter. --Robert Wilonsky