According to an article on informationweek.com: “This spring, when employers flood the U.S. government with petitions to hire H-1B visa workers, those companies likely will have a new convenience — electronic notification from the Dept. of Homeland Security about whether those applications have been approved.”
Currently, employers, beneficiaries or their representatives can register at uscis.gov to receive Case Status Notifications. For cases filed using the USCIS Premium Processing Service, Petitioners or their attorneys are also notified via e-mail when cases are approved.