When the new Millennium began in January 2000, it was the makers of Champagne who had the biggest hangovers, and they were whoppers. Their headaches lasted for the first nine months of last year.In spite of exhaustive promotion, consumers shunned expensive parties and stayed at home, leaving restaurants, retailers and resorts loaded with bubbly. It was October before orders resumed. Shipments of Champagne from France were up 40 percent in 1999--but they've been down 25 percent this year, leaving...