Rex, I had wondered about that recently too. His last post was in the "Thougts on 2008 Knoxville Cost Saving Rules" thread on 10/28. He editted a post he had made only 11 minutes prior. It now says only "I'm done here".
I hope he soon realizes that grassroots open-wheel racing in America is in deep doo-doo without his wisdom on IOW. We need for him to end his self-imposed exile.