Outside of a mid-level catcher, Morneau, Morales, or Cano... Not much makes sense or looks enticing to me.
Will the Sox pursue an OFer? They seem to be banking on young guys (or the guys already here) for that.
At pitcher, I could see them get a guy who maybe is coming off a down year or two. I don't see a major investment coming though.
I'd love a 3Bman, but the guys out there... not so much.