I'm way behind on working with the Enhanced Gameday hit location data - I'm working on adding the 2005, 2006 and 2008 seasons to the database, as well as trying to figure out if I can parse some extra data out of the 2008 data.
I'm also trying to create a defensive rating metric based upon the data, similar to the SAFE metric. I'm pretty comfortable with converting everything to vectors at this point, and have a rough idea about how to handle the smoothing function. Mostly at this point it's learning enough about R to actually do the implementation.
For those wondering about the accuracy of this data, it's not as good as the datasets from STATS, Inc. or BIS. I found an article comparing the various hit location datasets.
In the meantime, I've started doing some work with outfielders for the other site I blog at. The good news is that I've got the routines I use to make the plots much more automated than I did in the past, and so I can crank out plots a lot quicker now. If anyone has a particular fielder they're interested in - infield or outfield - let me know.