Four or five artists will perform daily, including vocalists Andgelique Kidjo and Michael McDonald, Toad The Wet Sprocket frontman Glen Phillips with Nickel Creek siblings Sara and Sean Watkins, hip-hop poet Saul Williams, country artist Billy Currington, singer/songwriters Suzanne Vega, Rickie Lee Jones, Linda Perry and Ben Kweller, offbeat performers Dresden Dolls and Nellie McKay and rock acts