From my understanding the varieties that will make good syrup are less suitable for seed production. Like others said, the syrup is a lot of work, much like maple syrup- has to be pressed, cooked, skimmed, etc. The mennonite communities here in KY use it a lot, they often have draft powered sorghum mills, and wood fired boilers. I'm not much of a fan of the syrup, and have little use for it with my cooking style. I have experimented with it as a chicken feed, and they do like it. It is easy to grow, and just cut and toss to the birds. Also I have cut just the tops, and it will produce a second smaller seed head in a single season. Much more successful than my corn through the last low rain summer.