The Zac Brown Band has joined the lineup of MerleFest 2010, which will take place April 29-May 2 in Wilkesboro, N.C. The ensemble will perform on the main stage on the opening night. Brown will also host the festival's Midnight Jam on May 1. Blues musician Taj Mahal has also joined the festival lineup. Previously announced entertainers include festival founder Doc Watson as well as Elvis Costello and the Sugarcanes, Steve Martin with the Steep Canyon Rangers, Little Feat, the Avett Brothers, WPA, Dailey & Vincent, Rhonda Vincent & the Rage and Sam Bush.