Actually, I'm the only one currently with that oversight for pglaf.org, and that's not where we will be doing experiments. I have other systems for that.
OK, so should I/We out here ignore for right now the instructions Marcello just posted at: http://www.gutenberg.org/wiki/Mercurial_Repository_How-To because I was starting to try to learn Hg and public keys and the like and I'd rather not do that if Marcello's approach isn't what PG is going to be doing? ??? I'm still just trying to figure out "the ground rules" which right now I hear Marcello saying "RST Only" whereas what I would like to try is "Minimalist Tweak to Existing HTML" to get it running correctly on EPUB and MOBI. And is not clear to me how a build chain gets invoked and how a DP/PG "end customer" who wants to try out the result of these flavors can find them and try them.