If you're like me, you saw the shelf-based Dock for Mac OS X Leopard and thought ... hey, I could put some heads in a jar on that! And now you can, thanks to the Futurama "Heads in Jarks" icons from Icon Factory. I give you my ... "Al Gore's Head in a Jar" Dock! (which will be even better once 10.5.2 is out, and you can assign icons to Stacks).

The icons are available for Windows as well as Mac. They've got a bunch of others as well, including one for The Crew, The Humans, The Aliens, and The Robots.