This is the most recent article a quick search found:
http://www.usatoday.com/story/news/nation/2015/06/24/melungeon-mountaineers-mixed-race/29252839/
And an older one about the DNA project:
http://www.huffingtonpost.com/2012/05/24/melungeon-dna-study-origin_n_1544489.html