Many thanks to Jiggs Casey for first posting his terra cotta smoker tutorial, and to Sawdustguy for his help with the pulled pork recipe. I think the grill came out well, and the pulled pork even better.
The heat source is a 1000w Proctor Silex electric burner (bought at ACE hardware for about $15). The nice thing about this model is that it has a steel case, so I could leave it in it's original case without worries. I changed the wiring to bypass the control switch and hooked it to an Auber controller for electric smokers. It holds the temp within a couple degrees very well.