To be honest, as far as who might be available in the third round, I haven't the slightest clue. I don't look into the players that much too have an opinion about who will go where in the draft.
I don't think Lacy is going anywhere, unless his performance is miserable this year. The clouds that hung over him as a draft prospect haven't cleared, even if they have changed a bit. I don't think there will be an outrageous offer out there for him, such that the Packers will let him walk. In fact, I think he comes back as good as ever, and he gets extended this season, both as compensation for being a bargain under his rookie contract and as a reward and incentive for refocusing his career.