I'll add another Sweet Baby Ray's endorsement. For pure simplicity, It's a winner.
If you're interested in making your own, I've got a TIGHT recipe that sounds strange because Iced Tea is an ingredient, but turns out real nice.
Iced Tea Barbecue Sauce
3/4 cup canned iced tea
3/4 cup ketchup
2 tablespoons Worcestershire sauce
2 tablespoons A.1. steak sauce
2 tablespoons brown sugar
1 tablespoon fresh lemon juice
1/2 teaspoon liquid smoke
1/2 teaspoon onion powder
1/2 teaspoon garlic powder
1/2 teaspoon freshly ground black pepper
Combine the iced tea, ketchup, Worcestershire sauce, steak sauce, brown sugar, lemon juice, liquid smoke, onion and garlic powders, and pepper in a heavy saucepan with 1/4 cup of water and gradually bring to a boil over medium-high heat.
Reduce the heat to medium to obtain a gentle simmer. Let the sauce simmer gently until slightly reduced, thick, and richly flavored, 6 to 8 minutes. Taste for seasoning, adding brown sugar or lemon juice as necessary; the sauce should be highly seasoned. If sauce is too thick or intense, thin with a little more water.
Transfer the sauce to a bowl or clean jar and let cool to room temperature before serving. Any leftover sauce (in the unlikely event that you have it) will keep in the refrigerator, covered, for several weeks. Let return to room temperature before serving.
Makes about 2 cups
http://www.bbqu.net/season2/208_4.html#iced_tea_sauce
If you've got a bit more time, making your own sauce is the way to go. Like with most things, you get out what you put in.