Yay. Smoked my first two racks of spare ribs today, pretty much according to Jeff Philipps' instructions, tho I didn't finish them in the smoker.
I smoked them for 3 hours with hickory pellets, splashed them with some OJ (which added a nice nuance to the final flavor), left them in for another hour sans smoke and splashed it again with OJ. Meanwhile my oven was heating up to 240, where they spent another couple hours wrapped in foil.
They were smoky, spicy (from the rub with a good dose of cayenne), crispy in the right spots and juicy for the most part. The smaller parts of the rack were perhaps a tad dry, but the meat was really tender without being mushy. You could pretty much pull the meat off the bones.
Lovely. Much less time than a butt, and *really* tasty. I can now safely make this for a dinner party :-)