One of my favourite web based comic artists, xkcd, has recently completed two sketches that when combined cover (almost) the 40+ orders of magnitude refered to by Edward Tufte and which are comic versions of the Eames Powers of Ten video and book.
From 46 Billion lights years up to Folks (Height = http://xkcd.com/482/)
From people at a PC to a Proton (Depth = http://xkcd.com/485/)
Matt