When the folks at CBS shooed Katie Couric out the door, one could almost hear the harrumph with which Scott Pelley was reinstalling the Old Regime of Ed Murrow. Unlike Couric, Pelley wasn’t debuting with celebrity interviews and updates on Tom Cruise’s baby. CBS is going back to biased Dan Rather basics, treating Couric’s tenure as little more than a palate cleanser. With Couric off the news grid in pursuit of cloning Oprah Winfrey’s success in feel-your-pain afternoon chat, who will be the public face of soft and marshmallowy News Lite? Coincidentally, NBC’s Meredith Vieira retired from NBC’s “Today” and NBC was contractually obligated to promote long-time morning news reader Ann Curry. How light is Ann? Last October, while narrating a story on how Russia implausibly unveiled a new set of inflatable weapons designed to fool spy satelittes, Curry added her own touch: “Wish all weapons were like that.”