My thoughts:
The 5 members of our current starting rotation (Schilling, Wells, Clement, Wakefield, Arroyo(going to the pen))
Bullpen (locks)
Timlin
Papelbon
Myers
Bradford
I think Dinardo makes it for 2 reasons. He's a lefty and a long man, 2 valuable things in the playoffs.
That leaves the last spot down to 2 guys in my opinion Hansen and Gonzalez. My gut feeling says Hansen makes it because the Sox will be kicking themselves if they have a guy with that kind of stuff sitting on the bench.