Correct, the Pats didn't benefit from the amnesty at all, really. That was what bugged me most about it: if it was going to be implemented, every team should have had a chance to utilize it. Instead, in August, a new rule came in saying that players who had been cut half a year ago weren't going to count against the cap after all.
The Pats should have at least been given a chance to exploit the amnesty on Warren, Banta-Cain, and Bodden. Then they could have used that money to trade for and sign a Brandon Lloyd type, or even push forward into 2012... the possibilities would have been endless.
Instead, since it was unreasonably backdated, the Jets (and almost nobody else) benefited from it. Whatever though, that just makes it even funnier that, even with the rules being rigged in their favor, the Jets are still screwed.