When I doodled my MA thesis in 2006 (see below), kind of as a joke, the doodle actually helped me develop the elevator-pitch version of my thesis (and then ultimately to write it). So, I plan to doodle my dissertation before I start working on it in earnest.
But for now, I challenge my current thesis- and diss-writing friends to doodle their work. Not illustrate, but doodle it. And then post it on your respective blogs/Facebook pages.