I'll think about it whenever I run a campaign in the future, but I already have so much material... and mostly only time to be a player, though I donate some time to judging RPGA events.
It's a cool challenge, but I'd probably end up trying some stuff from scratch, using a mix of monsters I always wanted to face, but never quite got to, in the way I wanted.
(I have a notion of an Underdark section that is skimpy on drow, duergar and other humanoid races because it's heavy with oozes, slimes, and vermin. Add in some converted Olive Slime and Olive Slime zombie goodness to explain the disappearance of townsfolk recently, and the PCs have a more puzzle-solving, scary "dungeon crawl" punctuated with vermin combats and the occasional ooze. Can you ever be sure you've destroyed the last bit of Olive Slime? Mwa-ha-ha! For the clueless, Olive Slime was a 2e slime with some intelligence that took over peoples' minds merely by dropping onto them, and turning them into Olive Slime Zombies. I have no idea if it's been converted for 3.5. Btw, I also like intelligent and/or carnivorous plants, and with proper care, an underground greenery area with vicious plants can be designed...)