If you’re interested in learning what people go through to create beautiful graphics from basic statistical output, then spatial.ly is a site worth bookmarking.
This post, Improving R Data Visualisations Through Design, is especially worth reading. It has a handful of well-explained examples from geographer Dr. James Cheshire’s new book, London: The Information Capital. I haven’t worked with R, but data visualisation is dear to my heart. In a former life, I created animations in Flash to demonstrate things like data flows for a security network. If I ever delve back into that sort of work again, I will definitely count on Dr. Cheshire as a resource.