Tuesday, May 27, 2008: Ed Zander will step down as the Chairman of the Board of Motorola at the end of May, a position he has held since 2004 and has served as the CEO at Motorola from 2004 through January 2008. Before coming to Motorola, Zander was with Silver Lake Partners from 2002-2004 after a successful 15-year stint at Sun Microsystems…