Google is improving their News search technology by weighting the source of the news in addition to the keyword relevancy and story release date. It will be interesting to see how they weight the news source. I would imagine they would use link structure to prioritize the news sources. I don't think they would just arbitrarily weight the sources as they see fit since there are a ton of them and it would raise issues of bias. Still, I don't think they could go solely by linking either, since we've already seen through general searches that websites find ways of artificially boosting their ranking. I guess only Google knows.