http://www.google.cn/logos/clickortreat1.gif
http://www.google.cn/logos/clickortreat2.gif
http://www.google.cn/logos/clickortreat3.gif
http://www.google.cn/logos/clickortreat4.gif

http://www.youtube.com/watch?v=0XAmavbsIV4

Thats Really Kool :)

Indeed!, very nice! YouTube Doodle:
http://www.websonic.nl/googledoodles/images/doodle_youtube_halloween_2009.jpg

originalfile http://s.ytimg.com/yt/img/logo_halloween-vfl129017.png

The logo from Yahoo is also very nice this time:

http://l.yimg.com/a/i/mntl/ww/events/mh/us/yahoo/091031/halloween09_metro2.swf