Joint textures, Texture gradients, & head textures can already do this.

~Not Supported
Or..... If you have any ideas for items and such, suggest them here, or on the item forger's thread.

There are probably very few players who know how, or have the capabilities, to make/forge items.
So a shop of user items would be quite barren.
The past makes you wanna die out of regret, and future makes you depressed out of anxiety. So by elimination, the present is likely the happiest time.
Not sure what he meant, but if there was an ingame texture shop where you could buy everything it would save some time and be more professional, just my shitty opinion.

Only game (that I know of) where the forum is a big ass part of the game itself.