Paul Liebenberg (another South African) and Karnazes are competing to be the first to finish all 4 legs of the series in one year. The series a part of a 4 race desert series including events in Chile, China, Egypt and Antarctica.
The final leg called "The Last Desert" will be a 250K race across the Antarctic peninsula. It starts on November 24, 2008, just about a month after the event in Egypt.
I am guessing that it will seem cold compared to the Sahara.
Go Dean, Go... And don't forget your mittens!