In the event you don't know how to prepare and/or shred a pork shoulder there's a great article on it on The Kitchn today.
On a totally different topic, who all ate corned beef and cabbage yesterday? Hopefully you adhered to the Twicebuzzed rules of St. Patty's day.
1. Never, ever, EVER eat corned beef at a restaurant on St. Patrick's day (this goes twice over for anywhere that doesn't have it on the menu the other 364 days of the year). Next year I might try corning my own.
2. Don't drink green beer, only Jello should be that color.
3. St. Patty's day is the absolute best day of the year to get a pint of Guinness since you know it'll be a relatively fresh keg.
Updated March 19, 2009:
Dinner was fantastic, as was the Guinness. More pork shoulder goodness on the foodie blogs today, this time with a mustard cream sauce.