His official site is responding slowly at the moment, so I'm copying this here:
http://buzzaldrin.com/south-pole-news/ EVACUATION TO CHRISTCHURCH NEW ZEALAND – 1915 UTC Thursday 1st December.
The evacuation flight for Buzz Aldrin has successfully landed at Christchurch, New Zealand and he has been transferred to hospital for examination. He is currently has fluid in his lungs but is responding well to antibiotics and being kept in overnight for observation. His condition is stable and his manager, who is currently with him, described him being in good spirits.
We would like to offer our sincere thanks to the team at the American National Science Foundation for accommodating Buzz and his manager on one of their flights from the South Pole to New Zealand via McMurdo.
There will be further updates when additional information is available.
ORIGINAL HOLDING STATEMENT FROM WHITE DESERT ABOUT SOUTH POLE MEDICAL EVACUATION
Buzz Aldrin has been evacuated from the South Pole. He was visiting the Pole as part of a tourist group operated by White Desert and while there his condition deteriorated. As a precaution, following discussion between White Desert’s doctor and the US Antarctic Program doctor, Buzz, accompanied by his manager, was evacuated on the first available flight out of the South Pole to McMurdo with the USAP under the care of a USAP doctor. His condition was described as stable on hand-over to the USAP medical team.
This flight is still in progress and there will be further updates when additional information is available.
