As we slam headlong into the chaos of our future, and embrace whatever stupid idea someone has for new media or a smart phone, we also have the opportunity to recall some pretty wonderful "old media", or "receding media technology".
The Wikipedia page on "split flap" displays:
The Museum of Modern Art in NYC on "Hacking the Solari"
A Youtube video of a real Solari sign (for Amtrak)
And finally, my simulation of the Solari sign, written without any documentation or operating guide of the sign itself. Clearly my simulation has a ways to go.