Fifteen years on, the chaotic and multiply revised Sugar human interface guidelines are still a thoughtful and interesting approach to reimagining how people interact, not with a computer, but with other people as facilitated through the use of a computer. I think a lot of the points made would reframe ultramobile computing interfaces in a much more humane way.
@djsundog I was like "wait this looks familiar" and then searched the page for "OLPC" and.. yup there it is. I was geographically adjacent to a lot of the primary development on that project because I lived near MIT at the height of it, so I spent a lot of time with people who worked on it and at workshops and talks.