At any rate, I mostly wanted to announce that I've opened up a community for updates. I will still probably post the most important updates here (when submissions open, when I start taking preorders, etc.), so if you're interested in the book but don't want to join, it'll work out. I do encourage you to follow the community--whether or not you actually join doesn't make a difference.
So check it out:
I'll probably make the first post there later today. Thank you again for your interest!
Edit: I guess I jumped the gun here a little-- submissions are OPEN, and the submission information is all up at fma_fanbook. :D