From an ESPN chat-
Matt (Boston,MA): Where will A.J Burnett be pitching next week?
Buster Olney: (11:22 AM ET ) Matt: If I had to guess, I would say the Red Sox; I think that's where Burnett wants to go, from what I hear, and he's got some power to steer this thing because he's a free agent at the end of the year. But if Kenny Williams absolutely decides to go for it, even overpaying, that's how he'll wind up in Chicago. But again, this is such a fluid situation, I wouldn't bet my house on any particular team; Boston is the educated guess, today.