OK let me summarize where we are so far.
Four people have expressed interest so far:
Airwolf (who is thinking about playing a Cleric)
FluidDragon
NarlethDrider (who has pointed towards a Half orc ranger)
Another person who has contacted me via Email. He as asked to be a rogue
No one has decided on a class just yet, so I'd say any class is open right now, however.
Hopefully we'll get at least two more players. I may throw in an NPC to round out the party, though I'd rather have 5-6 players.
I'll give you my character creation guidelines so that those of you who have decided to play can go ahead and create a character:
Use 28 Point buy (DMG page 19-20; email me if you don't have the DMG). Remember to add Racial ability bonuses/penalties after the point buy. Also, you may add two points to any ability (you can add two to one ability or split this among two abilities) However, the maximum ability score is 20 (at the start, that is)
All classes and races in the Player's handbook are available. I'd prefer no Psionics or no evil characters.
I'll also allow Monte Cook's varient Paladin, Sorceror, or Ranger. Actually, Monte Cook has two varient rangers, one in the Book of Hallowed might and one off his
website . You can use either, but choose one and stick with it.
Multiclassing. I'll stick with the limitations on mulitclassing for Paladins or Monks. Otherwise, I'll allow most combinations. If you want to multiclass I'd prefer players to use the optional rules for multiclassing at 1st level in the DMG page 40-41, or declare a character path describing your multiclass plan (a general plan, not necessarily a level-by level plan) right away.
Deterimine your starting GP according to the PHB and buy equipment accordingly. You can choose non-exotic equipment from the Arms and Equipment Guide or the WotC spattbooks.
In my campaign, all race-specific arms and equipment are not considered exotic to that particular race. Note that this may affect your feat selection. (E.g. Dwarves need not spend an exotic weapon proficiency on Dwarven Waraxe).
If you really want to choose a weapon not on your class list, let me know, and provide a rationale. I may allow you to choose one weapon at first level you can use (without spending a feat).
Write a simple background. For now, don]t get too detailed, we can flesh it out later. I don't plan on initially creating on a plot specifically built around the players; I hope to do more of that after the first adventure.
You don't have to choose a diety unless you're a Paladin, Cleric, or Druid (a druid can even opt to serve nature in general, IMC), though you can if you want. Choose any diety from the D&D pantheon (the Greyhawk pantheon) or another Greyhawk deity if you have access to materials. If you really want a deity not in the PHB, let me know which one and give a rationale. Finally, in my campaign St. Cuthburt is LG.
The campaign will start in in the World of Greyhawk (as per the Living Greyhawk Gazatteer) just north of the Gran March/Duchy of Ulek border. So you might make your self from that area or explain how you get there. If you don't have access to any World of Greyhawk (the LGG, the D&D Gazatteer, or an earlier greyhawk setting book or boxed set) material, just make a generic background description we can flesh out later. It won't matter for the first adventure.
Finally, if you want to use material from other d20 publishers or WotC Books I haven't mentioned, ask. If I have the book, have access to it, or you can send me the relavent material (ok if it's just a spell or a piece of equipment, for example), I'll consider it.
The following books are pretty much open:
Relics and Rituals I & II
Book of Eldritch Might I & II
Book of Hallowed might
Hammer and Helm
Traps and Treachery, the player's section (watch out for the traps, too

)
Moon Elves
I have some others as well.
That's all I can think of for now. Let me know if you have any questions.