Oh god when was the last time I updated this? I'll get to it I promise Names to this point have been added!
It appears that we have so many people who signed the petition and I'm impressed by the numbers too. I suggest the one who started the petition should also keep us posted on all touhou similar/related Gaia items. I kinda fancy them too.
This would be a great idea, but there's too damn many as it is. For the sake of my own sanity, I'm just going to track the ones that make the main list and then get fulfilled. If you need help making a Touhou avatar, PM me and I'll try to help you track some items down.
And if I might suggest....
Ran's tails/ears / hat Chen's tails and ears Yuka's parasol
Probability Space Hypervessel background.
Makai / Hokkai background
Palanquin Ship background Hakurei / Moriya Shrines / Backgrounds Alice's house BG Kirisame Magic Shop BG
The items that have been struck out already have some rough equivalents on Gaia (Yama no Tamago has some shrine backgrounds, Red Riding Hood has a house in the forest for Alice, the Bakaneko tails can be used for Chen, there's a ton of parasols for Yuuka, etc.). The others have been added to the front page list.