The Bonnaroo Music Festival has confirmed the latest round of artist additions. The 2008 festival also will offer sets from Stephen Marley, Wood Brothers, Money Mark, Tio, The Coup and Newton Faulkner. Meanwhile this year, Bonnaroo also will invite a minimum of two additional groups to perform at the fest via an OurStage.com competition. Plus, anyone who judges The Battle For The Roo will be entered to win one of 3 pairs of tickets to the event. Bonnaroo will return to Manchester, TN on June 12-15.