Jeju Island Eco-Tourism Project - Eco-tourism operator on Jeju, also providing a wealth of information about the island and its attractions. [Korean, English, Japanese, Russian] - http://jejueco.com/
Jejudo Tourist Association - Guide to Jeju, local food and drinks, traffic, lodging, shopping, leisure, festivals, and map. - http://www.hijeju.or.kr/eng/
Honeymoon Island - Article describing Jeju Island's popularity among Korean newlyweds. - http://www.gluckman.com/ChejuWed.html