Since recent advancements have been made towards the creation of what Stephenson calls mediatronic paper, I thought it would also be worth referring to something Christopher from The Curious Incident... could have used....

Jerz's Literacy Weblog (Online & Offline Literacy Links; Dennis G. Jerz)

People with autism spectrum disorders have a hard time determining others' emotions or even whether someone is paying attention to them. The system is designed to provide that missing information.