http://rki.kbs.co.kr/learn_korean/lessons/e_index.htm
This site is run by the Korean Broadcasting System (KBS.) It supports various languages including English, Chinese, Japanese, Spanish and others. Users will be able to Korean with ease with the help of flash animations with the voices of professional newscasters. I think this site will be very helpful to learn Korean online.
Sogang Korean Program
eLearning site operated by Sogang University (Seoul.)