A paper introducing the Human Security Index for the USA has been published by IEEE Earthzine:
http://www.earthzine.org/2011/05/04/the-human-security-index-potential-roles-for-the-environmental-and-earth-observation-communities/

For those who might be curious about the global HSI, about 1/5 of the way through that paper is a short note on the global HSI.  In the 2nd paragraph of that section is a hyperlink to "global HSI version 2" which goes to a page hosting data, sample maps, and an evolving documentation note on the global HSI.