Finally, a radial visualization which serves a purpose rather than just looking cool. Getting Genetics Done has a tutorial on using clustering functions in R. In it, they show how this this analysis:
is much better represented like this:
There's nothing wrong with making a chart which looks good - in fact it's encouraged - so long as the visual niceties enhance the message of the graphic. Radial graphics are all the rage these days, but they rarely help with information communication (and in many cases they detract!). It's nice to see a truly constructive application of the technique.