Unfortunatly I never had the opportunity to do client work on an infography, but it seems to be one of the most challenging task for a graphic designer. The perfect infography must synthetize complex information in a simple visual representation, which is not easy. The following examples take information architecture to another level by making it beautiful.
2. The modern listener guide
(I resized this one for the blog, click the link to see the original one that looks much better)