SunkenCiv is a huge treasure and resource for FR, the best. I haven’t been around much so I didn’t notice his absence.
If you go to his home page, you will see that his last post was in Mid-July. It looked like a normal, typical, Sunken-Civ kind of post.
I am very concerned about him.
He is still posting his great links and comical insight:
http://freerepublic.com/tag/by:sunkenciv/index?brevity=full;tab=comments