"I think we'll have a newscast that evolves over time," Katie Couric told the press in Denver Thursday, on day four of her cross-country tour. Couric will spend time in San Diego today before heading up the road to Los Angeles for the TCA Press Tour this weekend. At the town meetings, Couric and potential viewers have been talking about the Internet, among other subjects. The AP reports: "The changes, she said, could include expanding segments and breaking traditional time constraints of newscasting. The network is also focusing on how the Internet can enhance the nightly news, offering a place...