John Dewan's post on Nate McLouth's Gold Glove is pretty interesting. Dewan begins with the assumption that McLouth was the worst defensive outfielder in baseball last year based on the numbers, then moves to more moderate ground based on factors that some advanced metrics don't do a good job quantifying. McLouth's arm, for example, was pretty valuable last year. Dewan also helpfully points out that McLouth seems to have a problem judging where the wall is on deep fly balls--he lets balls carom off the wall and past him, back toward the infield.
(Thanks to Carnival Matleuse for e-mailing me the link.)