The Green Bay Packers depth at cornerback looks more shaky now then it did at the start of training camp. CB Pat Lee looks like he hasn't played in a year (which he hasn't). CB Brandon Underwood hurt his shoulder. And although his return was a long shot, CB Al Harris won't be available until mid-season at the earliest.
According to the Journal-Sentinel, undrafted CB Sam Shields is the likely nickel back. Shields has promise, but he is still playing like a rookie. It might have been a nice idea to trade for someone like CB Josh Wilson, who the Seahawks gave away for a 5th round pick. But it does appear that Baltimore is a perfect fit for the former University of Maryland star. And as Doug Farrar pointed out, Wilson is only 5'9" and current Seahawks GM (and former Packer exec.) John Schneider appears to prefer taller cornerbacks, just like the Packers. Wilson would be the shortest CB currently on the roster.
While Wilson was never a possibility, the Packers have been known to make trades before the final cuts are made. Obviously RB Ryan Grant for a 6th round pick in 2007 was a steal, but even the trade of OL Tony Moll for S Derrick Martin helped improve their depth. It will depend on the decisions made by other teams.