The Cubs went from hording minor league pitchers to hording minor league shortstops when they hired Tim Wilken as scouting director. One target was Cuban defector Jose Iglesias, who defected back in July of 2008 when the team was in Edmonton and then signed with the Boston Red Sox in September of 2009 for 4/8.25M. He played some in the Arizona Fall League and his defense is considered "special", but at just 20 years old he still has some time to grow into his bat.
Rumor has it though that the Cubs were actually the top bidders, but Iglesias chose the Red Sox because they were his favorite team growing up. Curse you childhood allegiances!!!
For what it's worth, BP has him as 3-star prospect and #6 in the Red Sox stocked system.