My five links:
I got most of my information from: www.deathpenaltyinfo.com.
I found some interesting historical data on executions here: http://users.bestweb.net/~rg/execution.htm. But I can't be entirely sure as to the veracity of it due to it just being some random person's website.
The original Chernoff Faces map: http://go.owu.edu/~jbkrygie/krygier_html/geog_353/geog_353_lo/geog_353_lo11_gr/turner_chernoff.jpg.
And while I make neither an argument for no against the death penalty with this map, I will point people to http://www.prodeathpenalty.com and http://www.antideathpenalty.org. But I have not read their literature but they seem to be on the up and up.