See :
http://www.sacbee.com/2010/08/01/2928247/qa-stem-cell-work-moves-quickly.html
Sure hope a treatment comes earlier than later.
Just yesterday, I asked my wife why man can fly (in a aeroplane) ? She replied it is because man saw bird flying.
I told myself same for hearing loss : now that man has seen how bird can restore their hearing loss, pretty soon, man can also restore human hearing loss.