Visualizing Networks with Hive Plots
bost.ocks.org
bost.ocks.org
For a summary of the effort's background and prospects, see my status report (http://groups.google.com/group/d3-js/browse_thread/thread/ba...).
http://mbostock.github.com/d3/ex/chord.html
It's also straightforward to transition between datasets and layouts: