I created this original image for the UMN page, because no clear art existed for it, and used it ever since. Like many, a unique avatar is much more recognizable than even a forum name. Especially for the old-timers like me without massive post counts. I've also created a few that you may have seen others use.
At site launch, my avi was a bad crop of a James Pond box, and my profile page art was the Solar Jetman box. On Joystiq I made a Solar Jetman profile and avatar but I don't think I used it here or it would be in my gallery. Heh. Joystiq.