The annual Americana gala in Wilkseboro, North Carolina, has announced its 2010 line-up. In addition to appearances by usual suspects, including host Doc Watson,  Sam Bush, John Cowan, and Donna the Buffalo, Merlefest will get a boosts from big names like Elvis Costello, Rhonda Vincent, Little Feat, and a Sunday closing set by the Avett Brothers. See the full line-up here.