Hey GlassEye! Well, to be honest I really enjoyed that game as well. But DnD 3.5 doesn't function well at levels beyond 20, let alone with Divine Ranks. These rules are reserved for DMs. Epic spellcasting is a "break it or leave it" mechanic. Epic levels without casting are pathetic. A level 19 WIzard can kill a level 40 Fighter no problem, so long as the FIghted doesn't use his wealth by level to emulate a spellcaster.
I think that, as Gods, the players are their own enemy the most. And I think a much simpler rule for divine ranks should be followed.
Quasi Deities: Can destroy most non-deity monsters or characters in combat due to their spectacular feats prowess (think Hercules, Achiles etc.) No control over reality and such, aparyt from what regular 1-9 spells or abilities might have given them.
Demigods: Each character level gives them the spellcasting ability of a chosen class. If they already have levels in a full spellcaster class, they may chose to double their caster level or take levels in a different caster class OR the abilities of a non-spellcaster class (BAB, HP and saving throws included).
DR1 gods: They may smite anything of lower divine rank as a standard action (no save).
DR2 gods: They get Alter Reality (a homebrewed version) which allows them to manifest anything (within reason) as many times per day as they have divine ranks. Does not work against deities of equal or lower DR.
DR3 gods: They get the power of creation to seed a world with life.
So on and so forth. I'm brainstorming.
Also, I came to share this, as I know you guys will appreciate it: