Falling in the way ahead of the curve category, Austin City Limits has confirmed its 2007 festival dates. The multi-day gathering will return to Austins Zilker Park from September 14-16. The festivals 2006 edition featured Tom Petty, Van Morrison, Willie Nelson, Massive Attack, the Flaming Lips. the String Cheese Incident, Ben Kweller, the Shins, Gnarls Barkley, the Duo, New Monsoon and Gomez, among others. Until then fans can test ACL IQ online.