The Red Sox need to put Lester in a room and ask him what it will take to get him on the team. If they wait around for weeks while he considers other offers, its going to bite the team in the ass.
Scherzer, Shields, Fister, Zimmerman, Price, Cueto, Leake, and about a half dozen other top talents are available right now. I would love Lester back -- probably more than any other player -- but if he's waiting for the Yankees, then the Red Sox might as well look for other options.