I think the white Embden, as mentioned above, are the ones the Mennonites had in the "lost" article that first caught my interest.
The reason this interests me so is two fold. I want to find a way to keep my yard and orchard down without the expenditure of gas and time, and I wish to stockpile some down for use in comforters, pillows, jackets, etc. I am also considering a hair sheep for the same purpose. Why couldn't one gather and wash the wool from their sheds and accumulate it for various purposes? Composting, insulating, dog beds, fire starter, etc.
Just looking for more ways to maximize my space without over extending my finances, really. The sale of offspring should pay for some feed for the sheep and the sale of goslings and down products may offset the feed for the geese.