I have used seitan like tofu. There's some recipes in the Moosewood vegetarian cookbook that uses it.
A funny story about seitan...
When my younger son was in HS he worked at the natural foods grocery store. I called him one day while he was working, to see if the store had it, because I had never heard of it and I wanted to make one of the recipes in the Moosewood book.
All I heard was him yelling was, "Hey, my mom wants to know if you have Satan here."