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Watch for little buttons to appear on the map to indicate that a person has Dugg a story. The buttons are placed where the user resides on the map. When you put your mouse over a button, it will display the user's name. When you click a button, it will display details about the story, with links to check out the Digg page or go directly to the article. Check out my blog to read up about this map.
Digg Map: RADAR