It always amuses me when I see something on a website and I find out that the person that created it is someone I know, this Vitruvian Optimus Prime was created by Barry Neeson and is available on RedBubble for just £17.24.
Via Illuminations and Other Stuff
Keeping with the Vitruvian theme is this Vitruvian Inpector Gadget image which is available as a T-Shirt over on Threadless.
Via Juxtapop