Oh yeah, I've hit up plenty of Lakewood Blueclaws games (the Philies single-A team). Ryan Howard did a couple rehab games there...needless to say he hit one way out over the scoreboard in centerfield.
I've gone to Trenton Thunder games for a while, dating back to when they were still affiliated with the Red Sox. Minor League baseball is awesome.
I have been to a couple Charlotte Knights game which is an affialate of the White Soxs, they used to be dominate but now they are average. Now that I go to NC State, the closest is the Durham Bulls which is a affilate of my Rays. If David Price comes through ill make the hour trip to Durham or our first overall pick this year.
We just got the Phillies AAA team to move into the area this year, they are playing about 30 min from my house. They are now called the Lehigh Valley IronPigs.....yeah, great name. But it should be fun to hit up games as I am a Phillies fan. Have been to minor league games in Trenton and Scranton as well.
Here in Orlando the only thing baseball-related we have is spring training, where I can go down and watch the Braves once or twice a year. If I'm ever in Jacksonville during the summer, I'll probably try to get to a Suns game though. They have a very nice team up there.