Universals web site and Rockits website both list it as open.
Edit. Just recieved a facebook comment from Universal saying it is open as well. I totally understand it is still under soft openings.
Universal Orlando Hollywood Rip Ride Rockit, Universal Orlando Resort’s highly anticipated roller coaster, is NOW OPEN. This radically innovative attraction includes first-ever maneuvers, cutting-edge technology, songs that span across five genres of music and a personalized take-home music video available for purchase.