N1ST,
I'm in northern WV which is south of you, but we're only at most one plant-hardiness zone different from you. What we call "winter rye" is generally used as a cover crop. It is a cereal rye, not a grass, and it will produce grain if you let it mature.
I plant Wheeler Rye (one of the winter ryes) as a cover crop in my vegetable gardens in the fall. By early March it is usually only a few inches tall, but when it's time to plow it's usually 12" to 15" tall.
I once let a small section of it mature, and it did produce grain which was quite tasty. I ate quite a bit of it just shaking it out in my hand every time I passed by, but it was more like a casual treat than "human consumption".
The cereal ryes supposedly have an allelopathic property which suppresses weeds. I'm a believer in that because last fall I didn't manage to get the rye sowed, and I was fighting weeds all this spring.
Of course if you till it in, it improves the soil.
One negative thing about it is that it keeps your soil damp/wet and probably cool in the spring. Wet soil could delay plowing. Cool soil isn't good for seed germination. I usually try to mow off the rye a few days before I want to plow to let the soil dry out.
As others have said, it's easy to grow. I usually till lightly in the fall, and then I spread the rye, but sometimes I just spread it without prior tilling. Rye will germinate at only a few degrees above freezing, but one extension-service website recommends sowing by October 1st in north-east USA.
Overall, I think the positives outweigh the negatives as far as using it for a cover crop.
This
website lists a lot of forage and cover crops with information about them (this is a commercial website but has useful information).
The
"Cover Crop Database" also has a lot of information (non-commercial .edu site).