Here is the roast after brining for 24 hours.  Whole Foods had a boneless pork shoulder roast all ready for the recipe -- I didn't need to ask to have anything special done.   It's a big one, cost $16 -- so, I didn't think that was too bad, especially compared with beef.  It will now cook for 6 hours until it's time to glaze and broil.  I also got a corn salad at Whole Foods, and will have fresh green beans and mashed potatoes.