This is a Textual Visualization. There are many different types of textual visualization, but this would be classified as a "Tag Cloud" where a list of words or phrases are sorted by some measure of relevance. For this particular visualization, stories on the website Digg are placed at the top as they are "dugg." The number in red represents the number of times the story has been dugg as new stories rise to the top. As is apparent, the more "diggs" a story gets, the larger the text appears.
