My dad used to work for Just Born...was there for about 15 years I think. He quit shortly after the new management team was brought in. I've actually been behind the scenes in the plant when I was growing up. Usually smelled like cinnamon from the Hot Tamales. And I know exactly how Peeps are made, but I won't tell.
While my dad was working there, we always had loads of Peeps and Bunnies for Easter. I usually ate them slightly stale. Putting them in the microwave was always fun. Oh, and if you put them in a vacuum (like a scientific vacuum), they blow up really big.