I have been kicking around the Athshe design around for many, many years now. I've found it difficult to explain clearly what it's about. Lately (in the fall of 2003), I've been working out more aspects of the design, and realize that much of that difficulty is because I don't understand it too well myself.
Athshe is named after the planet in Ursula K. Le Guin's wonderful story, "The Word for World is Forest".
Other Athshe links:
free software at levien.com