Here's a look at some of the top potential free agents (from MLBTradeRumors.com):

Type A
Bobby Abreu (Yankees)
Milton Bradley (Rangers)
Doug Brocail (Astros)
A.J. Burnett (Blue Jays)
Pat Burrell (Phillies)
Orlando Cabrera (White Sox)
Juan Cruz (Diamondbacks)
Ryan Dempster (Cubs)
Adam Dunn (Diamondbacks)
Brian Fuentes (Rockies)
Brian Giles (Padres)
Orlando Hudson (Diamondbacks)
Raul Ibanez (Mariners)
Jason Isringhausen (Cardinals)
Derek Lowe (Dodgers)
Damaso Marte (Yankees)
Jamie Moyer (Phillies)
Mike Mussina (Yankees)
Darren Oliver (Angels)
Oliver Perez (Mets)
Andy Pettitte (Yankees)
Manny Ramirez (Dodgers)
Edgar Renteria (Tigers)
Francisco Rodriguez (Angels)
Ivan Rodriguez (Yankees)
C.C. Sabathia (Brewers)
Ben Sheets (Brewers)
Russ Springer (Cardinals)
Mark Teixeira (Angels)
Jason Varitek (Red Sox)
Kerry Wood (Cubs)

That's 31 Type As, though Giles and Marte may have their options picked up and Mussina may retire.

Type B
Jeremy Affeldt (Reds)
Moises Alou (Mets)
Garret Anderson (Angels)
Joe Beimel (Dodgers)
Casey Blake (Dodgers)
Paul Byrd (Red Sox)
Mike Cameron (Brewers)
Carlos Delgado (Mets)
Alan Embree (Athletics)
Eric Gagne (Brewers)
Jon Garland (Angels)
Luis Gonzalez (Marlins)
Ken Griffey Jr. (White Sox)
Mark Grudzielanek (Royals)
Trevor Hoffman (Padres)
Bob Howry (Cubs)
Jeff Kent (Dodgers)
Braden Looper (Cardinals)
Mark Loretta (Astros)
Brandon Lyon (Diamondbacks)
Greg Maddux (Dodgers)
Trever Miller (Rays)
Miguel Olivo (Royals)
Brad Penny (Dodgers)
Dennys Reyes (Twins)
Brian Shouse (Brewers)
John Smoltz (Braves)
Frank Thomas (Athletics)
Salomon Torres (Brewers)
Juan Uribe (White Sox)
Tim Wakefield (Red Sox)
David Weathers (Reds)
Randy Wolf (Astros)
Jamey Wright (Rangers)
Gregg Zaun (Blue Jays)

That's 35 Type Bs, though Cameron, Delgado, Embree, Miller, Olivo, Penny, Torres, and Wakefield could have their options picked up and Alou, Griffey, Kent, and Maddux could retire.

MLB 2008 mlb free agents