Any Free Agents have to be signed before the current CBA expires on March 4. I think that IF you see teams signing players, then an agreement is close. If you see no players getting signed, then I would expect an impasse.
I guess if you were a gambling man, you could get ahead of the other 31 teams if you just went out and signed some guys before March 4, but these owners didn't get to be millionaires by making risky fianancial moves............
If this happens (no free agency movement) then I think that it might change BB's drafting philosophy. Usually BB fills any glaring holes in free agency so he is not trapped into drafting a certain player/position on draft day. The exception to that rule was after Washington left and the Pats entered the draft without a Nose Tackle, and miraculously Wilfork fell to 21 (NOBODY THOUGHT THAT WAS GOING TO HAPPEN, I think back then we were imagining that BB would have to trade up to 10-15 to get him). I guess you could say that Mankins was another first round NEED pick, so he is 2-2 there (turning a bling eye to the Maroney pick (which I have to admit that I was all for, (Draftnik head now hung in shame)).
My guess is that Mankins gets franchised, hopefully they could sign him to a long term deal. Light has been more than servicable at LT for years. But if they do not resign him, the Pats enter the draft with a gaping hole at Tackle (RT or LT depending on what you want to do with Vollmer). If that happens then look for the Pats to go LT at #17, once again putting off any hopes of BB drafting a pure pass rusher.