Here is a recipe I recently tried and it was sooo yummy. We had it with baked beans, melon and corn on the cob. It calls for a combo of beef and pork, but I used pork alone and it worked just fine.

Old-Fashioned Barbeque Sandwiches

2 1/2 pounds boneless chuck roast
2 1/2 pounds boneless pork roast, trimmed
2 quarts water
2 ribs celery, cut in large pieces
1 large onion, cut in large pieces
2 carrots, cut in large pieces
2 bay leaves
8 whole cloves
1 tsp salt
1/4 tsp black pepper
12 buns

Sauce
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2 Tblsp butter
1 cup chopped onion
1 1/2 cups meat stock
1 cup catsup
1/2 cup cider vinegar
1/3 cup granulated sugar
1 Tblsp + 1 tsp worcestershire sauce
1 Tblsp brown sugar
2 tsp celery salt
2 tsp paprika
1/2 tsp chili powder
1/2 tsp ground cumin
1/2 tsp black pepper
1/2 tsp salt

Preheat oven to 325 degrees F. Place meats, vegetables and seasonings in a large roaster. Cover and bake for 3 hours. Remove pork and continue baking beef another hour, or until very tender. Shred and cut the meats into bite-size pieces while still warm.
In a large heavy sauce pan, saute butter and onion for sauce until onion is transparent. Add remaining ingredients and mix well, then add chopped meats. Simmer over LOW heat until mixture is quite thick but still juicy. This will take about 15 min (if you cook too long the sauce will totally evaporate). Don't stir too often, you want the meat to stay in good-size pieces. Serve on hot buns.