Power Laws in Chess Openings
physics.aps.org
physics.aps.org
http://cs.unm.edu/~aaron/blog/archives/2009/11/power_laws_an...
It's especially interesting that they call the power law distribution of wealth into question.
EDIT: the link to the shalizi and newman review in the blog post is a link to a "buy this .pdf" site. Here's the mentioned article on the arxiv