Earlier quoted context omitted.
Really? Most of that chart is just big text. Big text is not an infographic. I would say the most interesting one I've come across recently is http://xkcd.com/radiation/ .
Is that a particularly effective graphic? Look at how the green doses transition to the orange ones (with a legend "all green doses combined" corresponding to an irregular number of orange boxes), and then look at the transition from orange to yellow; are all the orange doses equivalent to 50sv, or are all the orange doses equivalent to one box? I agree that the XKCD "radiation" chart is an instance where an XKCD-sty…
The "radiation doses combined" transition seemed fairly clear to me. In every case the collective doses are measured in the new SI-prefixed unit delineated by the scale on the left. If I were to criticize anything I would be a little more wary of the color choices and the box labeling. The = sign and parenthetic dose notation seems a little confused (the blue box dose size uses a different convention from the others).
While the chart could layout some things a little more clearly, I think that Minard's chart shows that one shouldn't reduce information content solely for the sake of simplicity.