I normally stuff with a brick of cream cheese, Jimmy Dean sausage (pre cooked), shreaded cheddar jack cheese, garlic salt.
I leave a few seeds in the jalapenos for heat, stuff, wrap with bacon and smoke for about two hours. YUM!!
I also recently tried a variation where I used smoked, pulled, brisket mixed with BBQ sauce. Stuffed and smoked.
Occasionally, when I'm feeling froggy, I will take them off the smoker, coat in egg wash and panko bread crumbs, and deep fry to make a popper. Also very good, but considerably more unhealthy ;-)