I'm still trying to study for the US General license exam and the HF band questions always trip me up. I'm thinking of other ways I can display information about bands than the generic ARRL charts.

Has anyone seen any wildly alternative graphical band representations, or are there any ideas of a cool way to display useful information?

My dataviz background is in R, so I'm thinking I could build a table of band variables and try different ways of displaying.