In my column this morning I mentioned that a new version of the BIPChart Windows application I wrote a couple years ago for my own research has been updated with data from 2003 through 2006. The software displays the percentages and directionality of ground balls, fly balls, line drives, and pop ups for both hitters and pitchers for each year with hitters broken down by side of the plate they hit from (switch hitters getting two entries) and pitchers shown against both left and right handed hitters.
You can download it here. Although most machines will already have the prerequisite .NET Framework installed, you can also download it from Microsoft. Enjoy.