Hollywood's major studios Tuesday unveiled plans to email parents movie rating information to help people who want to know more about new films' language or other content before letting kids see them. Parents can sign up for the new service at the MPAA's website, MPAA.org, or at filmratings.com. Emails will be sent out weekly, generally on Tuesdays, the MPAA said. The MPAA represents Hollywood's major studios in government and public policy matters. Reuters reports.