Everything is sounding good, and everyone can play, the big responsibility here will be breaking everyone down into groups.
BTW, I'm dropping all restrictions on races and classes and such, and everyone can make sure to spend all 8,800,000 gold, even if I told them otherwise before.
You can have epic spells researched, just pay the cost out of your starting xp and starting gold and it's yours.
Here is what I'm thinking for a gaming strategy, since were talking Play by Post. In order to limit the responsibility of ALL players, we break up into small groups of two or three players each, each group with a co-dm that knows at least thier own particular story arc they are following. I answer questions the DMs don't want to answer themselves, and I run combat, cause I think I'm good for that. I link the story arcs, and tell you guys when you overlap.
Every group will post in a particular color-code so that we all know who is in our group, and who is not. We keep it organized that way. Also, if we lose 3 or 6 players, we simply mix groups till we get them right again. Seems neat to me, though I could be an idiot, never know

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I'll have my own color code, which will be for applications to everyone, that's what I'm thinking at least. My job is to deal with our custom world, integrating the races and classes the players introduce, and try and figure out what's going on everywhere. Meanwhile each group deals with specifics event by event. Hell, one group could spend the entire time making money, monopolizing on a city, and selling thier truely incredible spell-power, meanwhile the rest of the players are hack n' slashing an epic dungeon crawl.
This is what I'm thinking now, but I could be delerious.