The GB running game the past few seasons has been awesome and although Ahman certainly is a talented back, the other backs there thrived in that system quite well too which tells me it's more about the greatness of that Oline than any particular runner. IMO, Green's value takes a big hit here as well as that entire running game. Favre should now see little reason to come back and if he does, I think his #s become adversely affected as well.
Javon Walker's value in this, however, may not be too greatly affected. You've got to figure that defenses are going to be at least a little more effective in stuffing the running game there so that should mean more looks in his direction and he proved last year that he can be an elite WR in the league. If anything, perhaps now, he slides a little bit on people's draft charts and may be had a little bit lower.
I like simple pleasures, like butter in my ass, lollipops in my mouth. That's just me.