If you are looking for some Halloween resources to use on your Promethean board, then take a look at the Promethean Planet website.
They have a Halloween resource pack that contains spooky backgrounds and images. It also contains some game template pages for adding a halloween theme to some lesson plenary activities such as Pictionary, Hot Seat and Tic Tac Toe.
Smartboard users might like to check out this nice Halloween Ghost Countdown made by Jim over at Teachers Love Smartboards.
And not IWB related, but check out this amazing Cylon Jack-o-Lantern 🙂 Amazing stuff.
Have a good Halloween!