we started out with a couple ideas and made a bunch of different plots: 2D plots, 3D plots, data projected along principal components:
http://www.eecs.harvard.edu/~dcai/ratio.pdf
part of that led to a fun plot of the distributions of bakery items from the recipes I scraped:
http://cache.boston.com/ideas/graphics/buildatetrahedron.pdf
it's taken from this article in the Boston Globe: