Doodle Google:
http://www.google.cn/logos/moonfestival2008w5.gif

Doodle Baidu:
http://www.baidu.com/img/baidu_logo_jr_0913_zqj.gif

Doodles used earlier for the Moonfestival,

2007
http://www.websonic.nl/googledoodles/images/doodle_chinees_maanfeest_2007.jpg

2006
http://www.websonic.nl/googledoodles/images/doodle_chinees_maanfeest_2006.jpg

2005
http://www.websonic.nl/googledoodles/images/doodle_chinees_maanfeest_2005.jpg

...and don't forget Vietnam's moonfestival has a different logo every year:

http://www.google.com.vn/logos/moonfestival2008w13.gif

:)

also korean's thanks giving day http://www.google.com/logos/kr_thanksgiving08.gif

on korean logo, is is the Sun or the Moon?

I think it's a moon, because it is celebrated on a day of the lunar Korean calendar.