I can't remember who I got this from, but crank it up to full-screen and the highest resolution and prepare to say "Oooooh" a lot.
A cube made of gears:
Courtesy of BoingBoing
My favourite response to Rick Perry's video:
I'm off to see the very-pretty-looking Hugo in an hour. Rather looking forward to it, particularly after recommendations from heyokish and poisonduk.
Original post on Dreamwidth - there are comments there.