Riccardo Manzotti has some pretty cool Philosophical Cartoons on his site:
http://www.consciousness.it/RM_Cartoons.php
His "spread mind" site is great too:
As a "seeker" I sometimes wonder if he figured out something close to what nonduality teaches, only in a more technical language (ie. consciousnsss is not located inside anymore than it is outside, therefore somewhat blurring the lines between I and the world). I think his example of the rainbow is such a great metaphor.
Bernardo Kastrup has his theories as well with his whirlpool" metaphor but to me it sounds like it makes sense only to him, and I don't get much out of his metaphor. Whereas Riccardo's pointers are reminiscent of older teachings in that they really invite the reader to examine direct experience (Just my interpretation of his theory).