I'll try to update this as often as possible but guys that could possibly be on the Bills FA radar:
WR
Jets WR Laveranues Coles
Raiders WR Ronald Curry
Carolina WR DJ Hackett
Bucs WR Joey Galloway
Bucs WR Ike Hilliard
Patriots WR Kelley Washington
Steelers WR Nate Washington
RB
Bucs RB Warrick Dunn
Jags RB Fred Taylor
Saints RB Deuce McAllister
LB
Bucs LB Cato June
Bucs LB Derrick Brooks ( who may retire )
Redskins LB Marcus Washington
S
Houston S Will Demps
Raiders S Gabril Wilson
DE
Texans DE Anthony Weaver
Raiders DE Kalimba Edwards