Maybe if you told us what you're after? What are your requirements in a setting? What kind of game do you like to play?
+1
Suggestions / Opinions
1. This is gonna sound odd in a way but Have you read the Tome series? I'm not in love with the mechanics they suggest but I love the world view they present. Basically just as a campaign setting its brilliantly thought out.
2. You could also set it in a 4.0 style world. Use 3.5 take the 4.0 points of light idea, run with it. I once sat down with my group started talking and made a homebrew that was exactly like that before 4th came out.
3. Consider, sitting down with your group and talking about a homebrew that would have all the palettable elements you'll enjoy.
4. The Rokugon setting (since it's easily the best D&D setting objectively) lol
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Facts.
1. Faerun was 3.5 before it was all said and done
2. The players handbook setting ... Is not greyhawk, (FYI). (despite the use of some of its gods)
3. There was a setting called the "Kindoms of Kalamak" which apparently was a little known side venture of D&D but it was "Official" or at least it carried the logo.
4. Sadly, for 3.5 ongoing support, the Pathfinder books will be the place where you'll find the most adventures and have the least work. (They did make Dragon magazine after all.)