I tend to think your questions are rather writer-processy, commentary-rich things in themselves. They definitely make me think about things I haven't that I can attempt to apply to my own writing. As you've said, some of these things are impossible to put into words--I don't know how much better you can say it. I think the first comm idea would be very difficult for all the reasons stated, as well as the problem of edits and how some of us edit-on-the-fly; would someone like that post every hour they worked on fic? Or wait until there's a substantial change in the draft?

The DVD commentary issue is interesting, as there are very few real DVD commentaries I like. And as you know, I love the filmmaking process--there's jsut something unhelpful (to me) about most of these tracks. The commentators say so many common-sense things, or else they rob their film of its meaning for me (when I discover the process was a lot less deep/interesting than I thought). I like the funny ones (as in, commentaries by people with a modicum of humor) and the in-character ones, and certain films have useful things to say. But on the whole I stay away. I've never read a commentary for a fic, though I definitely will read whatever you come up with for yours (and I'll attempt one of my own, if you're ever inclined and if i can remember jack about writing it).

I think we're learning something interesting about process from our little experiment, as well.