Sunday at ACL is typically more low-key, local affair, after the out-of-towners have hopped in their cars and planes back home. But, there are plenty of jewels to be mined for those who choose to stick around: Neko Case, The Raconteurs, Tegan and Sara, and The Foo Fighters, who close the festival later tonight. First stop, though, is country-bluegrass darling Gillian Welch on the AMD stage, who apparently is being joined at the moment by last night's co-headliner Alison Krauss. Beautiful.