BOISE, Idaho - Billionaire J.R. Simplot, the spud king of America whose wealth also helped create one of the world's biggest computer chip makers, died Sunday at his Boise home. He was 99. Ada County Coroner Erwin Sonnenberg said Simplot apparently died of natural causes. The quintessential Idaho farmer increasingly dominated the state's business and political landscape for 70 years, and the company that bears his name remains a powerful force today — in Idaho and beyond. Simplot and his family were ranked at No. 80 on Forbes magazine's 2006 list of richest Americans, with an estimated wealth of $3.2...