I planted these things many years ago, and liked them so much I don't know why I didn't again, except that they were so late. So this year I tried them 2 months earlier, and I am now seeing huge numbers of them (the plant is over 7 feet tall).
In recent years I have seen them in Asian markets occasionally, though not in good condition, but some of you may be luckier. Have any of you used them? They add another flavor component to Thai curries (and I'm sure they are used elsewhere, as well), and tonight I made one, with my first harvest, plus a bunch of other Asian eggplants. I forgot how good they were! Here is what they look like, and are between 3/8 and 1/2" in size: