information aesthetics.
a set of circular graphs of 3 levels of Wikipedia category pages & their interconnections. the parent node is centered in the graph. pages that are linked from this parent node are rendered inside the ball. pages that are linked to the latter (secondary) nodes are rendered on the outer ring. the color of the edges between them represent their depth from the parent node. highly connected groups of pages are clustered clump together, hereby forming topical groups.
[link: chrisharrison.net]
more wikipedia data visualizations: wikipedia history mosaic & wikipedia most visited & chromogram wikipedia editing history & history flow & wikipedia treemap.
more circular data visualizations: mammal supertree graph & digg arc & radial document viewer & circular treemap & circos & schemaball & gnom.
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This is remarkable work. The visuals are just astounding, and really is beautiful to look at. Its a great way to get an abstract view of how everything is connected, but whether there is an true use or functionality is questionable.
there is another wikipedia visualization called CASUAL, using the related wikipedia words. It was published in infosthetics already:
http://infosthetics.com/archives/2006/06/casual_search_visualization.html