Minor League Defensive Stats
I've worked with Jeff Sackmann from Minor League Splits to apply the TotalZone defensive calculations to the minor leagues. We've done all the full season leagues through July 31st. Jeff provides the raw data, which he gathers from MLB gameday files, and I run the calculations.
Some highlights are offered at Hardball Times. All the player data can be found on minor league splits. The numbers are not park adjusted, and I have my doubts about the consistency of the scorekeeping, but the results are interesting nonetheless.