Daypop Top News Bursts is a site that lists clusters of news stories around word bursts. They don’t give the algorithm, but it seems to do something like what Google News does – provides clusters of stories that have similar subjects and which have a “heightened useage of certain words…”
Can this be used on a text? Could you treat a text with paragraphs as if each paragraph were a story in time. Sentences could be pulled that best show the heightened usage of words. Something like that…