The 2007 ACL Fest lineup came into focus a bit earlier than expected this afternoon. Much like last year's online scavenger hunt, the folks at Charles Attal have decided to whet appetites with an ACL Crossword puzzle in this Thursday's Chronicle. The two big names revealed today: The White Stripes and Björk. Well played, ACL. The crossword reveal: The White Stripes, Björk, The Decemberists, Peter, Bjorn, and John, Rodrigo Y Gabriela, Robert Earl Keen,......