I was reluctant to add the bat ears. The addition of the ears and a utility belt made Tux less distinguishable. He was no longer Tux but some cute cartoony batman character.
Here is the logo without the bat ears
Yep, thats tux alright.
Speaking of the bat ears, I now notice a minor flaw.
His left ear should not have the outline of his head.
it makes it seem as if the ear is behind the head.
I'll see if I can take care of that.
Edit: I updated the first logo above with the ear correction.