CNN's new Pipeline service, which allows viewers to watch four "pipes" of live television at any time of the day, is receiving much applause from reviewers. The service was launched Monday with live coverage of Saddam Hussein's trial and the presentation of the 9/11 Commission's final report. On its website, PC Magazine called the service "breathtaking" and remarked that it is "certainly the most impressive video offering the Web has ever seen." But Stephen Bryant, associate editor of, which tracks developments in online publishing, while acknowledging that Pipeline is "technically impressive," complains that it is nevertheless "based on the one-to-many broadcast model of television. And in an online world that increasingly favors participation and interactivity, that's actually a step backward."