Alright...
LcKedovan, you're not the only newcomer to PbP games - I'm relatively new myself. The closest I've participated in is the current Game of Death (I like to say I'm winning, but I'm biased.) I've read some of the other ones though, so I think we'll be fine. There's always mistakes at the start - I daresay we'll figure it out sooner or later.
Anyway, I just got back from Calculus (blech!) and, more importantly, the computer Help Desk here at school, and they fixed up my personal webspace so that I can use it now... which means, in general terms, that I'll be able to start posting stuff about the setting now. Yes, it's homebrew. It's not all that different from Greyhawk, though probably a bit more blank... I haven't had any world shaking events, like the Iuz Wars, to screw things up, intentionally. It's a good backdrop for heroic, but not world-saving, adventuring. Or so I like to think.
Classes that've been tweaked - the psion, the ranger, the sorcerer. Monks use OA rules for substituting abilities. And I've really been thinking about turning paladin's into a prestige class, but it's not an issue yet. Races have, by and large, not been changed too much. Well, at least they're all still there. Characteristically, there's a number of changes; mechanically, the gnomes have been changed the most. They're druids now, not illusionist tricksters. But I ramble - you can see the details when I get it posted.