I just did my first fatty the other week. I used Jimmy Dean's Italian sausage. The entire pound. I rolled it in rub and put it on the smoker. It taste better the day after. Slice it up and make a sandwich out of it. I believe Green Hornet has made a few. Here are two pictures of the fatty I did along with some Baby Back ribs (I still prefer spare ribs).
I bought a pound of Jimmy Dean's Maple sausage today to try it later this week if I get time.