I know a computer artist (is that what they're called?) living in Denmark who is thinking about doing the same thing, but with the letter representing the breed of dog pictured. He (Patrick O'Toole), hasn't finished it yet (far as I know) but he has completed the alphabet with animals in general, again starting with the same letter.

http://alphabetimals.com/

On the website you can support a charity, type your name in the letters, and even see it in another language (alphabetimals.dk), where there are three extra letters. I think he talked about working on other languages as well.

I'm not joking about the dog breed thing either. I just think "X" might be holding him back!