Engine may be moon-trip choice, Huntsville Times
"When the plan to return to the moon was announced, Cowing said, "people inside and outside of NASA thought that it would just take shuttle hardware and create the rockets needed to go to the International Space Station and on to the moon. "That doesn't seem to be the case. We are seeing a slow drift away from shuttle-derived hardware, and now there's probably going to be a mix of shuttle hardware and" expendable rockets, Cowing said." ... "To Cowing, NASA is "in reality just creating two brand-new rockets - one for crew and one for cargo. In the end, there will probably be little of today's shuttle" used in the rockets."