According to this, we need a CAPTCHA image for the site, don't we? Let's hear some suggestions.
how about our Robotic Operating Buddy (larger image)
Dog from Half-Life 2:
Image from Gamasutra.com
What about Mother Brain:
And to attempt to answer my question, I propose the Star Control 2 Chmmr:
Star Control 2 is now under the GPL license so I hope there won't be any copyright issues.
How about a Gearmo from Super Mario Galaxy:
Image from Enter-Play.com