Ok after pulling an all nighter to get ready for the convention I am ready with 6 pre generated character and not quite as much work on the main adventure as I had hoped. But with quality characters it will make it easier for me to ad hoc certain parts of the adventure.
I am certainly going to give the races chapter a strong solid test with mid level type characters. Basically the adventuring group is equal to 7th level characters if they were standard races the group is as follows.
Bark Leaf 6th level Shad Druid Female NG (has nice magical staff)
Cubed 5th Level Rouge Modron Fighter TN No Sex
Fek Rezni 7th level Nathri Illusionist Male NG
Jalen Open Plains 3rd Level Bariaur Barbarian Male CG
Sarah (Asp) 6th Level Tiefling Rouge Female CG
Nuthus 0 Level Khaasta Male CG (slightly modified using Splint Mail Armor and Great Sword which normally are not allowed without class advancement)
The level differences of course are because some of the races are powerful than others and have level adjustments included with them.
The most glaring of course being the Level O Khaasta Nuthus.
I am proud to say that I didn't fold or combine using any standard races. I really wanted to get a Planescape feel and ultimently decided I should get every player to play a Planewalker race to get them into the setting a litle more.
I will post the created characters on the site sometime. They are 3 pages long (except 2 for Nuthus) 1 page character sheet, 1 page backround, history, race bio, and 1 page explaining their feats/abilities.
I guess all there is now is to hope I get a decent turnout and that that the players (if they are like 3 or 4) pick a semi balanced group. 
Anyway its 7:18 am CST and I need to get some sleep the con starts in 8 hours! Good thing i pushed my first session back to 5 pm Saturday rather than Friday night....
Wish me luck!
I am not all that young I am 24 which I know isn't old but still! I have been interested though never run in Planescape almost since the day it came out. I have owned the basic box set and slowly purchased items (now I have the whole set of 30 campaign items) of Planescape since about 4-5 months after the setting came out. 
Bon chance, young GM. Go forth and bring the smackies.