CNN has launched a new application to show how a story has developed over time. This is basically a collection of all CNN-posted stories associated with a particular event. The example they give is the Anthrax case. http://behindthescenes.blogs.cnn.com/
This allows readers to easily dig into the recent history of a story. The impact of a news service that offered such a view into history -AND incorporated stories from other key news media (CNN, BBC, and New York Times for example)- could be extremely powerful piece of online media to showcase varying perspectives. It will be interesting to see if partnerships emerge in this area – also incorporate other online media (video in addition to text-based stories).