From the Nieman Foundation at Harvard:
Fuego FAQ
Fuego is a tool that monitors the portion of the Twitterverse that talks about the future of journalism and sees what they’re talking about. Every hour, it pulls in the links they’re discussing, analyzes them for popularity and freshness, does a little math, and determines which are at the center of the conversation.FUEGO
Each tile on Fuego represents a story people are talking about. They’re arranged in rank order, starting with the most discussed story of the moment. Each one contains the story’s headline, its source, and a sample tweet that links to that story, to provide context about why it’s being talked about.
What are the ways to use Fuego?
There are three views for Fuego; you can swap between them at the top of the Fuego page. They vary based on how far back into its archives you want Fuego to look for links.
The default Fuego view looks at new links from the past 24 hours. More recent links are given more weight than older ones. It’s the best way to get a quick glance at the day’s conversation....MORE
If that's too navel-gazing for you there's always Party Like a Journalist:
