This character made his first appearance in the storyboards of if{!NULL} but did not make it into the final product.
I had revived "it" in LightWave , as that was the software used in classes I teach at Montclair State University . As of Fall '09, we have switched to Maya. The original brain model was actually created as a NURBS object in Maya 1.0, I did re-rework him(?) and now have a fully rigged version in Maya.
There is a good chance that it will appear in what is tentatively called "Scattered Brain Matter". I will be posting occasional progress updates on my blog (tag: Eye Brain)