Whole Hog Cafe: World Champion BBQ based in Little Rock.
http://www.wholehogcafe.com/home.htm
There's 12 of them, from New Orleans to New Mexico.
2008 Memphis-in-May World Championship, First Place Overall, Third Place Ribs
2002 Memphis-in-May World Championship, First Place Whole Hog, Second Place Ribs
2000 Awards Memphis-in-May World Overall Championship, Second Place Ribs
2000 Tunica Rivergate Festival, Grand Champion, First Place Whole Hog
Springfield Area Rotary's Rockin Ribs BBQ Festival, Grand Champion, First Place Whole Hog, First Place Shoulder, First Place Ribs

First off, just because it says "world championship" in the name of the bbq comp doesn't mean the winners are world champs. Secondly, whats cooked in a competition isn't what you're gonna get at the restaurant.
Btw, just to entertain you, here is just one team from KC that does pretty well for itself.
The Slaughterhouse Five 1st Place Brisket, American Royal Invitational, 1999
1st Place Pork, American Royal Open, 2000
1st Place Pork, American Royal Invitational, 2001
Kansas City BBQ Society "Team-of-the-Year", 1993
Grand Champion, World Brisket Open, 1992
Reserve Grand Champion, World Brisket Open, 1992
Reserve Grand Champion, Jack Daniel's World BBQ Championship, 1995
1st Place Pork, Jack Daniel's World BBQ Championship, 1992
1st Place Brisket, Jack Daniel's World BBQ Championship, 1993
1st Place Chicken, Jack Daniel's World BBQ Championship, 1996
1st Place BBQ Sauce, Jack Daniel's World BBQ Championship, 1996
Grand Champion, Great Lenexa BBQ Battle Kansas Championship, 1996
Grand Champion, Oklahoma State Championship, Ponca City, 1993
Grand Champion, Sunflower State Championship, Kansas City, 1993
Grand Champion, McClouth, Kansas, 1993
Grand Champion, Arkansas State Championship, Holiday Island, 1993
Grand Champion, Oklahoma State Championship, Tulsa, 1993
Grand Champion, Bates County Beef-A-Thon, Butler, Mo, 1993
Grand Champion, Sunflower State Championship, Kansas City, 1994
Grand Champion, Missouri State Championship, North Kansas City, 1994
Grand Champion, Arkansas State Championship, Holiday Island, 1995
Grand Champion, Sam's Club Cookout America, 1996
Grand Champion, Nebraska State Championship, Freemont, 2004
Grand Champion, Kansas State Championship, Garnett, 2007
Grand Champion, Alabama State Championship, Mobile, 2008
Grand Champion, Kansas State Championship, Lawrence, 2008
Grand Champion, Kansas State Championship, DeSoto, Kansas, 2010
Legend of The American Royal Award, 2010