http://www.google.com/logos/2010/chuseok10-hp.gif

on http://www.google.co.kr/

http://www.google.com.hk/logos/2010/moon_festival10-hp.gif

Only Japan is missing. Last year there where doodles on this day on Korea, China and Japan.

From Google.co.kr:

http://www.google.co.kr/search?q=%ED%95%9C%EA%B0%80%EC%9C%84&ct=chuseok10-hp&oi=ddle

From Google.com.hk:

http://www.google.com.hk/search?q=%E4%B8%AD%E7%A7%8B%E7%AF%80&ct=moon_festival10-hp&oi=ddle