The Atlanta Symphony musicians are holding an event tonight outside the Woodruff Center, where they have been locked out by a management that seems to have learned absolutely nothing from the recent debacle of the Minnesota Orchestra. Meanwhile, John Adams, John Corigliano, and other leading American composers have published an open letter at NewMusicBox; Robert Spano, Altanta's music director, speaks up for the musicians in an interview with the Times's Michael Cooper; and Donald Runnicles, the principal guest conductor, does the same in an interview with the Guardian's Tom Service. For a blistering series of posts on mismanagement in Atlanta, read Mask of the Flower Prince, the pen name of Scott Chamberlain, who sings with the Minnesota Chorale. On a happier note, the Minnesota Orchestra's new season opens tomorrow; Chamberlain conveys the atmosphere inside the building.