I'd go for the trade. I'll echo above, Walker is a gamer, and even Javon Walker at 80% of his pre-injury status would make him and Lee a formidable tandem for years to come. We also get rid of our 33 yr old malcontent for a 28 yr old game breaker.
To do this deal tho, i'd make it contingent on us signing Walker to an extension. He's currently going into his last season on his rookie contract, and playing for peanuts ($650,000 base salary).
As for holding out, remember this...he held out at the advice of Rosenhaus last summer, along with most of the rest of rosenhaus's clients. WALKER HAS FIRED ROSENHAUS AS HIS AGENT. His agent is now Kennard McGuire, and has been for a while.
Walker wants out of GB for the crappy way they treated him. FWIW, heres his career numbers...
2002 - 22-391-1
2003 - 41-716-9
2004 - 89-1382-12
2005 - injured in 1st game