Today I tried the "snake method" of arranging coals in my Weber kettle - see the pics of how this works. The coals are arranged as a snake, 2 deep and 2 tall - around the circumference of the kettle. You light about 8 or 9 of them in a chimney and place them at the end of the snake. This causes a slow burn over the course of several hours. Toss a couple chunks of mesquite on top of the snake near the beginning of the burn.
I got this setup going and temps were maintaned from 240-260 for just nearly 4 hours.
Towards the end I took them out and finished them off in foil bathed in apple juice at 250F for 1 hour in my oven. I think this was a mistake because they turned out to be fairly dry. The meat wasn't falling off the bone as they were before. I think they were overdone. The flavor was awesome - it was just the texture and the moisture that needed work.
Anyways, still tweaking/experimenting with this. Hard to go wrong, really