We've got a special section in our user-generated recipe site for Hallowe'en party recipes. Featuring great themed recipes including (edible!) Haunted Human Hearts, Eerie Eyeballs and Freaky Witches Fingers.
Have a look here: http://recipe.methodmint.com/methods/tagged/halloween/
All recipes are editable and you can contribute your own back to share with the community if you wish - more very welcome! Any suggestions/ideas also appreciated.