Just last week I was complaining that LA's Barbecue Festival wasn't a real competition, even though it was the perfect opportunity to test different regions' styles against each other. Little did I realize that Paul Kirk, the "ambassador of barbecue," had done just that in his new book America's Best BBQ.Kirk -- who hails from Kansas City -- is a pit-master (he's won in the open competition at American Royal) and is a certified master barbecue judge. For his new book, which comes out tomorrow, h