If Rob won't write User's manual of rio, fs etc, why someone in Vitanuova can write one, and sell the books of manuals with it. I say this, because Plan 9 has two aspects to be considered, one is a target for OS reseachers, and the other is a clearer base for someone, probably concerning with education? to use it for applications. Vitanuova, probably, targetting the latter, I suppose. Kenji