My wife and I are going to this in September. I wish we would've gone last year because the '06 lineup was just a Murderers Row of Awesomeness, in my opinion (click link to see).
The official '07 lineup comes out in May but I've read that Andrew Bird, Kings of Leon, Robert Earl Keen and Ben Kweller are among those who've committed to play this year.
http://www.aclfestival.com/lineup.aspx
Has anyone on the boards been to this before? If so, any recommendations on places to stay, places to eat & drink, etc.? We're really excited to make this trip.