Kanye West has given his side of the story about what happened at Bonnaroo here.
There's also more at cnn. He calls the people at Bonnaroo idiots who didn't know how to set up his stage.
My point is still this - Kanye should have come out and addressed the crowd, before 3 p.m., to let them know there were problems and they were not his fault. He could have easily done that, but didn't even apologize or give a reason once he took the stage.