Bad Byron's 'Butt Rub', to be exact http://www.buttrub.com/ . I picked it up in Kansas City on my last trip, at a really great BBQ joint in a (functioning) gas station called Oklahoma Joe's.

The pork butt was from J N Z Deli. To my shame, I don't actually know where they source their meat, so this is a reminder to go and ask.

The pork marinated in the dry rub all day, then I cooked it for 5 hours at 300 degrees AKA the usual method. I'll see about experimenting with a whiskey based BBQ sauce in the next day or so.