Across America, the pure love and popularity of barbecue cookery have gone through the roof. Prepared in one regional style or another, in the South and beyond, barbecue is one of the nation's most distinctive culinary arts. And people aren't just eating it; they're also reading books and articles and watching TV shows about it. But why is it, asks Adrian Miller--admitted 'cuehead and longtime certified barbecue judge--that in today's barbecue culture...