Apple is joining with at least 60 other large corporations in submitting a filing to the Supreme Court in support of extending marriage rights to gay people and against California's Proposition 8, continuing the iPhone maker's long record of supporting equal rights for homosexual couples. Other "friend of the court" filings are coming from diverse sources, including one that includes over 75 well-known Republican leaders -- including New Jersey Governor Chris Christie and Utah Governor Jon Huntsman, among others.