Buying, Selling And Twittering All The Way

NEW YORK TIMES — Once upon a time, people mailed their holiday wishes to the North Pole and hoped for a reply on Christmas Day. Nowadays they are sending their wishes into cyberspace and are apt to get a reply in minutes. America’s first Twitter Christmas got under way in earnest on Friday. Across the land, retailers and their customers used the social networking site to talk to one another about bargains, problems, purchases and shopping strategies...