I hope I didn't post this last yer. The Wonderful Wonderblog blog currently has a countdown for Halloween. It's not a day by day countdown though. The blogger stopped posting in October 8. I believe the intended goal was to post daily. Unfortunately the blogger, Erick, has a hard time keeping up with the countdown due to personal issues. It does have good Halloween items. There are also good non-Halloween related pop culture posts. Great stuff.
Additionally, there is also a real time list of other blogs' halloween countdowns and posts.
Wonderful Wonderblog - Halloween Countdown 2008
October 8, 2008