Alex Wallau , who rose from working as a director and producer at ABC Sports to calling play by play for boxing matches to advising Disney mainstays ranging from Robert A. Iger to Jimmy Kimmel, died Friday after a long battle with throat cancer at the age of 80. Wallau was seen as a critical guide to the media and TV business within Disney — by both people who worked off camera and those who appeared regularly in front of it. At a recent Bloomberg conference in Los Angeles , late night host