Neutrino is in fact quite alive, now that I've discovered beautiful PHP framework called CakePHP. It is inspired by Ruby on Rails, and of course shares the MVC pattern.
More info will be posted here; sometime in the future. I am currently continuing my work on Neutrino (this site is now run by Neutrino 0.1alpha) so there is no time to write. (This does not mean you should not write comments below.)