The new checklist is now online:
English:
The Birds Korea Checklist for the Republic of Korea: 2013
http://www.birdskorea.org/Birds/Checklist/BK-CL-Checklist-info-2013.shtml
Korean:
새와생명의터 2013 대한민국 조류목록
http://www.birdskorea.or.kr/Birds/Checklist/BK-CL-Checklist-info-2013.shtml