Expect to see more speculation about San Diego DE Igor Olshansky, who San Diego benched late last season, and Dallas DE Chris Canty, as it gets closer to the start of free agency. I've got nothing against these two players, they both could fill the role, but defensive end in a 3-4 is a thankless job. The Packers don't need to spend a lot of money in free agency to bring in players like that. They just need to look for the next Corey Williams, and Mike Sherman drafted him in the 6th round.
Now Bill Barnwell has suggested Olshansky too:
More than anything, they need players who fit into their new defensive scheme. They could use a big defensive end who's familiar with the 3-4, and fortunately, there are two who qualify: Cowboys defensive end Chris Canty and Chargers end Igor Olshansky each make sense, although the financing could be difficult. They could take a flier on Cowboys backup Stephen Bowen as well. They'll also need another linebacker on the interior; that could end up being Eric Barton, formerly of the Jets, or Andra Davis of the Browns.