Politics took center stage in U.S. news this week, thanks to mid-term elections. As expected, there was plenty of coverage in the mainstream media as well as blogs. Because bloggers commonly comment on news stories that they find interesting, a few sites that analyze blog content have become great resources for finding news about a given topic. My favorite free aggregator is currently Techmeme, which does a great job of surfacing the most-discussed technology stories online.

At Biz360, we monitor tens of millions of blogs—which gives us tons of data to mine. Because we also track thousands of mainstream media web sites, we’re able to track links between blogs and the media. In November so far, we’ve tracked 764,000 links from blogs to mainstream media web sites (and hundreds of thousands going the other direction as well). Analyzing the links enables us to surface some interesting nuggets, like this list of the most-linked news stories since November 1:

So why no articles on Democrats retaking Congress or Rumsfeld’s resignation? Even though these were two of the top topics in the news, they didn’t generate a definitive article that was linked to heavily by other writers. Because some of the stories developed over the course of multiple days, linking was diffused across different articles from many different sources.

The articles that did make this list span a number of different topics, but most of them share these common traits:

• Interestingness (a term coined by Flickr): the kinds of stories that spawn reactions and discussions.
• Authority: Many of the most-linked stories are based on exclusive reports or news scoops from trusted organizations. Half of the top 10 stories were from CNN, the third most-linked source after The New York Times and Washington Post.

Taken as a whole, online link analysis can be a valuable component of corporate early warning systems in market intelligence solutions like Market360. It’s important to know not only what’s being said, but also how far it’s being spread.