Frederik Pohl is 93 years old, and apart from a few years in the 1940s, when he was busy defeating Adolf Hitler with the assistance of the U.S. Army Air Force, has been involved in science fiction activities since the age of 11.
http://www.thewaythefutureblogs.com/frederik-pohl/
Trooper, he posted his last ‘blog entry the day he died, or at least, someone did.
http://www.thewaythefutureblogs.com/
I got to see Mr. Pohl when he spoke at the University of Central Florida, back around 1979.