On the front page of the Bonnaroo website there is a section called 'special cuts' where you can sample audio of bands in this year's line up. One Big Holiday is one of the three options right now. (The other two are from Los Lonely Boys and Medeski, Martin and Wood) I'm not sure if they rotate these daily or weekly or at all.
link: http://www.bonnaroo.com/swf-txt/base.html