In case you missed it, here's an article from the NYT that summarizes recent development. (Publish2, which is cited here, is a newspaper-friendly partner you can approach for free help in establishing a link process at your site.)
Embracing the hyperlink ethos of the Web to a degree not seen before, news organizations are becoming more comfortable linking to competitors — acting in effect like aggregators. The Washington Post recently introduced a political Web site that recommends rival sites. This week NBC will begin introducing Web sites for its local TV stations with links to local newspapers, radio stations, online videos and other sources. And The New York Times will soon offer its online readers an alternative home page with links to competitors.
These experiments exemplify “link journalism,” an idea that is gaining traction in other newsrooms across the country. “It is a fundamentally different mindset” for journalists, said Scott Karp, chief of the Web-based newswire Publish2, who coined the term.