Wine Spectator/em>'s Tim Fish and Augustus Weed report that vine shoots weren't the only things sprouting this season in California wine country. Several wineries changed hands in a flurry of deals. It was a surprising change after two years of little business activity. Analysts credit the recent mergers to the improving economy-they're predicting double digit growth for California wineries in 2011. Those who weathered the tough times are expanding, getting ready for better times. At a recent trade seminar, Joe Ciatti, a partner in Zepponi & Co., a firm that advises wineries on mergers and acquisitions, predicted $1 billion in deals this year.