I have scheduled a brown bag on the future of Firefox's build system. It is tentatively scheduled for November 29 at noon Mountain View time (I would present earlier but MozCamp and US Thanksgiving are conspiring to prevent many from attending).
My primary goal of the talk is to spread knowledge about everything that's going on and why the planned changes (some would call them radical) are needed and how we arrived at them versus alternatives.
If you have a topic you'd like addressed or a question you'd like answered, please jot them down at  and I'll try to incorporate them. (That link also includes a rough outline of the presentation if you want a preview.)
I'll send out more details and a confirmation of the time in a few weeks.