So, I feel like a nub asking about, but no matter how much I've been fiddling, I haven't been able to upload a picture for my WoW character.

Is this in fact not possible, or am I just blind?

It seems they added that field but there isn't any way to associate an image with it. *sigh*

I'm guessing that's one of the many "Coming Soon" features such as the raids tab on your character pages