After years of planning, building and waiting, it's official.  The new Saint Luke’s Magic Valley Regional Medical Center is now open for business. The doors of the new 70,000 square-foot hospital opened for business on Saturday. That was also the day hospital staff moved close to 70 patients from the old building to the new facility.   Some are concerned that patients might still show up at the old hospital.   Administrators say they've tried to advertise the move as much as they could, but if that happens, they can dispatch an ambulance very quickly to the old location. But again the old hospital building no longer houses any medical treatment facilities or personnel.