Corn will sprout. It doesn't have to be "seed" corn. I agree that seed corn would be treated with fungicide and insecticide. Wouldn't want you to be eating that either but regular corn harvested from a regular corn field will sprout just fine. It is the fact that it's a hybrid crop is the only reason it isn't re-used. Regular corn price today is about $6 per bushel. Seed corn is about $225 per bushel. Feed corn is the same thing. It won't be treated with anything. Of course, if you've got a spare $300 or so, I can get you some pesticide free seed corn...
Another edit: Corn seed is usually harvested about 1/2 milk line which is when the corn is about 1/2 developed. There's lots of reasons for this but the take home message is that feed corn will be full of starch, seed corn will be 1/2 full at best and ultimately, starch is what you want. I could recommend some higher fermentable and higher extractable starch corn. I won't, but I could.
Why would it have to be organic? Any regular corn would work fine too.
because modern agricultural chemicals are destroying our health and environment?
Is that baiting? sorry GMAC I know you're an ag chem guy and just couldn't help myself. 
I think maybe Tom meant that if he is going to use seed corn it should be organic as non-organic seed is treated.
Mort, every time I start to like you...
Corn is what I do. Not chemicals. I spend more hours looking at corn, talking about corn, thinking about corn etc than any normal human being should.