The manifesto element comes partly due to the number of times we've (that is, the little cabal that drafted it) have been to events where people have failed to do these things. Point taken though. :)
But if you ask me, it has a wonderful feel to it already. The thing about the word "manifesto" is that it doesn't match the tone. A manifesto is something that points out the flaws and announces it is time for change. The unabomber wrote a manifesto. Marx wrote a manifesto. The Agile guys wrote a manifesto. Manifestos are rants with calls to action. This didn't have enough rant to it.
Like I said, a very tiny nit. If it weren't for my hang-up with the word, I wouldn't have mentioned it. An altogether terrific job.