A few things to note, I've been finding some troubles implementing the additions I want to the forum so there is still work going on. Also I will be making sure the Chao Emoticons are updated and added to.
I made a thread here:
viewtopic.php?f=13&t=47085
And I have had positive responses and many people making new emoticons! I thought I will post a criteria here that should be followed, firstly starting with a sprite sheet, original credit for the hero and dark recolours I believe goes to "Dragon Goddess".

Now many of you have been recolouring the chao with your own pallette - which although cool, I don;t think I will be adding them to the site (unless there is overwhelming demand). I will add emoticons as I see them in the thread!
1. Must use the same colour scheme as the rest of the emoticons/sprite sheet.
2. Must not be different height as mentioned in the other thread (a few of the current emoticons are mismatched)
3. Stick to just neutral, hero, and dark Chao with normal evolution.