Quote from ChaosGuardian
Ladies and gentlemen, the letter has been sent! If someone can try to estimate a ToA, then I'll be able to know when I can fully have the letter open to the public. There's a couple of things I edited since the printing, but nothing major. I also took off the signature and I had to print out another last page and I forgot to make a smiley face, but at least it's done!
This update has been added to the OP. All pictures containing the letter still remain.
You forgot the smiley face?
How could you?