A day after Ashton Kutcher beat CNN in a race to get a million Twitter followers, Oprah Winfrey has stepped up to the plate by posting her first Twitter message. She wrote Friday morning: "HI TWITTERS. THANK YOU FOR A WARM WELCOME. FEELING REALLY 21st CENTURY." As the New York Times points out in insta-analysis, "The digerati will probably scream about all the Internet etiquette rules she broke. She used all capital letters, which typically indicates screaming. She called Twitter users 'Twitters' instead of 'Twitterers.'" Even so, she may have the fastest-growing Twitter audience yet.