The hot stove has started to warm up, with Javier Vasquez (Marlins) and Jon Garland (Dodgers) signing, and more rumors coming along.
The "definitive rumor" site is MLB Trade Rumors.
Currently, the Red Sox "prospective" lineup looks something like this.
OF - Jacoby Ellsbury
2B - Dustin Pedroia
DH - David Ortiz
1B - Kevin Youkilis
OF - J.D. Drew
3B - Jed Lowrie
C - Jarrod Saltalamacchia
OF - Mike Cameron
SS - Marco Scutaro
Bench (5 to be filled) Varitek (free agent), Darnell McDonald, Eric Patterson, Ryan Kalish
Pitchers (11 to be filled)
Rotation: Lester, Buchholz, Lackey, Beckett, Matsuzaka
Bullpen: Papelbon, Bard, Atchison, Doubront (2 to be filled)
The immediate issues without much imagination:
1) Very limited right-handed power (options Adrian Beltre, Paul Konerko, Jason Werth)
2) Bullpen inconsistency (options Kerry Wood, Scott Downs, J.J. Putz, Grant Balfour, Arthur Rhodes)
3) Uncertainty at catcher (no immediate solution)
4) Blockbuster trades (have to acquire power hitters)
Currently the fans seem concerned about the Sox "going cheap", and accumulating/over-rating draft choices. Oh to be a fly on the wall in Theo Epstein's office. Free agents (to an extent) wait for the market to be set, so we'll have to wait. Although most of the issue becomes money, there's also geography, and their role. We have to trust that the Sox "brain trust" is spending as much time try to solve the problems as Sox fans collectively spend thinking about them.