Jack,
If you have info on the Eladrin, Devas, Goliaths, or Genasi we'd LOVE to hear about it!
Devas: Former allies of the couatls in the old battles against the demons and rashakas, persisting despite the couatls being long gone.
Eladrins: Have always been there, but kept to themselves, only coming out of their 7 great cities when they occasionally world-falled. But after the Day of Mourning, they found themselves severed from the Feywild and stuck on Eberron. From what I read, they are still trying to get back.
Goliath: Originate from Xen'drik, but left when the giants rose to power. They exist as always, spread out in the mountains, living as they always have, with traditions etc etc.
Genasi are extremely rare and no one knows what they are, not even themselves! They could be everything from dwarves warped by the volcanic eruptions of the fist of Onatar or creations of the Arcane Congress. They have no homeland and live on the frindge of society.
How many pages are given to chapters 1 and 5?
19 and 38.
Do they go over region by region with background feats like the FRPG?
You get associated skills, depending on your region of origin. From those associated skills, you pick one to get a +2 bonus to, or to add to your class skill list. And yes, they go over region by region.