Great story, and I too have purchased from Geechie Boy Mill (and Carolina Plantation as well) - great stuff. As an aside, Significant Eater and I really enjoy popcorn. So when I see unusual, or just different popcorn than that which I can buy locally, I try to grab some.
We were recently in Burlington, VT - that's the stuff in the big jar at the top. And then when we were in Milwaukee, I found the two jars at bottom at the Milwaukee Public Market. The labels from each; too bad they don't identify the actual varieties of corn. As can be seen in the bottom right jar, there are some small kernels in there. They pop up nicely, and the texture/taste is quite different than the larger kernels.