It's confirmed that HE Appey Rinpoche passes away December the 28th, 2010 - OM AH HUM.
Below news from Jeff Watt site - http://sakyaresourceguide.blogspot.com
Khenpo Appey (1927-2010)
It is again, within two weeks, with a very sad heart that I announce that Khenpo Appey has passed away, December the 28th, 2010. I first met Khenpo Appey in 1975 in Rajpur India during the Lamdre Tsogshe given by Sakya Trizin. It was there that I had an opportunity to spend time with Rinpoche, ask questions and learn that he was truly one of the great living Sakya masters - a Dzongsar Khenpo in the true spirit of Jamyang Khyentse Wangpo and Chokyi Lodro.
It is also fair to say that of all the great Tibetan teachers to come out of Tibet it was him that I found most intimidating - it was in front of him that I felt I always had to be on my best behaviour.
Gorampa himself would be proud of the accomplishments of Khenpo Appey. He was the foundational rock for Sakya scholarship for the last 50 years and has tirelessly prepared the way for innumerable scholar practitioners of the future. Bravo to a life well lived in the service of others.