Here are the four bigs ones I could see going down:
ABB - Although I think they'll be added later rather than sooner because of Mountain Jam Thievery Corporation - Fills the need for a major secondary electronic act (plus Langerado gig fell through) Matisyahu - Fills the need for more reggae, got his start at Roo and also has an album coming out in the spring Jim James (with friends?) - He's supposedly playing solo gigs. Maybe this turns out to be with Oberst and Ward, both of whom are also suspiciously missing from the lineup. I'd love to see a Which Stage lineup that went James (Solo) > Costello (Solo) > Byrne
"It's hard to say whether seeing Kellz backed by Jim James and his lion's mane hairdo or Billy Idol rocking out next to John Oates and his soul patch was weirder to watch. Let's just say both were beautifully bizarre sights to behold."