Well, here's what I know; but someone will probably have to add some parts I missed:
Barachiel is done for the Hebdomad, the rest haven't been started. Unosarta is working on them.
We've got 9 Powers in concept form, but nothing beyond that. Nobody is working on them as of yet, but Eldan, Myself, and blackjack each suggested three.
For the High Castes, the Principality, Authority, and Virtue are done; the Dominion is almost done; and the Throne is well underway. I'm working on them.
Below that, we've got Dice's list (Potentially incomplete, I just copied his post rather go through the rest of the thread looking for the others that got suggested):
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• Throne
• Scepter
• Blade--Sword, __
o Sword--??
o --
• Truth--Justice, Righteousness
• Justice--retribution effects, anti-Evil debuffs
o Righteousness--, pro-Good buffs
• Life--__, __, __
• Word--Logos, Pathos, Ethos
o Logos--utterances, atonement
o Pathos--power words, charm
o Ethos--divine word spells, geas
• --
• --
• Sentinel--Owl, Falcon, Dove, Eagle, Osprey
o Owl--petrification, sight in darkness
o Falcon--dazing/stunning, distance sight
o Dove--calm emotions, detect intentions
o Eagle--exhaustion, stealth detection
o Osprey--fear, detect illusions/invisibility
• Hound--Greyhound, Bloodhound, Harrier, Foxhound, Retriever
o Greyhound--sprinting, evading/dodging
o Bloodhound--tracking, plane shifting
o Harrier--endurance, delayed damage
o Foxhound--detection, ??
o Retriever--fetching, marking (mark of justice etc.)
• Warden--Guardian, Watcher, Shield, __, __, __
• Trumpet--Herald, Harbinger, __, __, __, __
o Herald--long range communication
o Harbinger--??
• Lantern-Chastity, Temperance, Charity, Diligence, Patience, Kindess, Humility
o Chastity--purify physical debuffs
o Temperance--"damps" enemy attacks
o Charity--grant uses of SLAs
o Diligence--take 10/take 20 stuff
o Patience--reroll some checks
o Kindness--"linked minds" effect
o Humility--remove mental debuffs

of which all of the Lanterns (Eldan), the Greyhound, Bloodhound, and Foxhound for the Hounds, the Phalanx for the Wardens, and the Eagle for the Sentinels (All me) are done.
Layers wise, we just have Lunia. Eldan is working on them.
For classes, we have blackjack's Celestial Warlock and the prestige classes that Sir_Chivalry made; although I don't know if a decision was ever made as to whether we were going to use those or make new ones.
Otherwise, the only other decision I can recall is that we are using Dicefreaks canon for all planes outside of Celestia.
Teamwise; I think we have Myself, Eldan, Chivalry, Tygre, Dice, Unosorta and you; blackjack has quit while Hamishspence, LOTRfan, and Zaydos haven't really contributed enough to be team members so far. As for their jobs, I've got them as:
Me: High Castes and variants, mostly melee types
Eldan: Planes and Lantern variants
Chivalry: Prestige classes?
Tygre: Overseer
Dice: ???
Unosorta: Hebdomad
You: Organizing