Throughout the mountains of north Georgia, American chestnuts still sprout saplings from ancient roots, reach a certain height and ultimately die from the blight. A small stand of mature American chestnuts flourish near Pine Mountain, Georgia, and were discovered in the last decade. They are being studied to determine the why and how of their survival.
http://www.washingtonpost.com/wp-dyn/content/article/2006/05/19/AR2006051901548.html