Some Halloween-related links:
Misc
History of Halloween
Halloween e-card
Shelf Check #121
Skull a day blog
Exorcist wanted for library loo! Via Lis News
Symphonies of Terror: Halloween Movie Soundtracks to Make You Shiver
Haunted Libraries Around the World
Halloween is here jokes
Halloween Search Engine logos
Stories
Halloween Ghost Stories
Twenty Spooky Stories via librarian.net
Videos
Halloween Awakening
The Shining – Bunnies
Watch horror B-Movies online
This is Halloween from Nightmare Before Christmas
Games/Puzzles
Undead Smackdown
Simpson’s Halloween Puzzle
Halloween Jigsaw
Halloween Jigsaws
Happy Samhain
Claire's Blog 
Thanx for the list. Now I know what I’m going to do this Halloween.