A Blender artist called Alex Fraser has published on his web site a great tutorial on how to setup the eyes of a character to track a target.
In the tutorial, Alex shows us how to deal with a character with flat eye balls. He uses the new tools available in Blender 2.46 RC1, so if you want to try out the tutorial, make sure you download the right version of Blender.
To check out the tutorial, visit this link. You will find there the source models available to download as well.
