My mom actually had a recipe for a spiced pie crust that she sometimes used with pumpkin pie. I've used it, but I decided that I don't want the filling to have any competition, and I like the way a plain crust works off of it. However, I might consider using that spice crust for a less expressive filling.
I've put sage in a chicken pot pie crust (hot water crust recipe), but I prefer to leave it out. A good pie crust has a mouth feel that herbs and spices can mess with.