According to Nick Cafardo at the Boston Globe, you can expect the Red Sox to listen to offers for Daisuke Matsuzaka this offseason. There's a hope Matsuzaka will right the ship and return to success after injuries this season to help his trade value.
Matsuzaka's recent comments criticizing the team's rehab process might have been too much for him to have a place on the organization. Cafardo wonders if the team underestimated "the cultural and philosophical differences that would lead to a constant butting of heads." Matsuzaka would have to sign off on any deal, but indications are that he would okay a trade.
Cafardo also talked to a GM who said that Matsuzaka should draw interest from teams, as the Red Sox have already paid the enormous posting fee (over $51MM), his contract is otherwise reasonable, and because the Sox have a good history of taking care of their pitchers.