There was lots of hype around celebrities for Michael Jackson’s defense, but their performances have been less than riveting. SANTA MARIA, Calif. -- The man with the oversized chin walked confidently to the witness stand, turned to the court clerk and held up his right hand. "My name is Jay Leno. L-E-N-O," he said loudly, as if anybody didn't know. With that, the biggest name in the big-name trial of Michael Jackson took his turn before jurors, following actor Macaulay Culkin, preceding comedian Chris Tucker, and highlighting the celebrity current that has rippled through this case. Even celebrities who didn't...