This is a pretty popular item on http://www.bbq-brethren.com/ although it was my first time making it.
Chuck Roast rubbed with Oakridge BBQ Black Ops rub (http://www.oakridgebbq.com/shop/signature-edition-black-ops-brisket-rub/#axzz3cUYgEfZj). Smoked for about 3 hours till bark was good. Internal temp was 150 at this point. Then placed into a pan of onions, green peppers, garlic, mushrooms, a few dashes of worcestershire sauce, and then a can of Guiness. Cover with foil and continue to cook till fall apart. This one was 207 internal temp when I took it off.
Shred and serve on a bun, wrap, whatever.