Hi,
Concerning ETNA, I'd just like to point out that it's Laurent Jouanneau of Disruptive Innovation ( http://disruptive-innovations.com/ ) who created it (and he still works on it, see http://www.ljouanneau.com/blog/en ).
And he already is a member of Mozpad, as webmaster of Xulfr.org .

You may also want to invite Pete Collins to take part in mozpad discussions about this. He has worked on a number of tools to make Mozilla application development easier over the years. I don't think any of the following projects are currently under active development, but Pete is still around working on other things.

http://demiurge.mozdev.org/
http://xptk.mozdev.org/
http://jslib.mozdev.org/
http://chameleon.mozdev.org/

Yes Laurent Jouanneau works for DI and ETNA is anything but a dead project. Laurent's working on a new rng validator for it.
I'm also working on fullerscreen pro, a slideshow editor, and Composer is not dead.

Just curious, I didn't see any mention on mozpad that eclipse had been selected as the base for an IDE. I would think that using the same technologies for the IDE that are used for the apps/extensions would be highly beneficial, and not require those interested in pursuing an IDE to learn java and a whole new platform (eclipse).

(From Alex: It's been the subject of discussion on mozpad for a while. FWIW, Shane, I agree with you. However, plasticmillion and Mukunda will be speaking on this in more detail, since they're closer to that effort.)