Google Halloween Logos: Halloween activities include trick-or-treating, wearing costumes and attending costume parties, carving jack-o’-lanterns, ghost tours, bonfires, visiting haunted attractions, pranks, telling scary stories, and watching horror films. [Wiki]
Blogoscoped forum reports that Google has new Easter egg for Halloween. They have added following notorious code in their robots.txt file: User-agent: Kids Disallow: /tricks Allow: /treats Halloween Logos from other search engines and websites: (from SEO Round Table) Yahoo: AOL: YouTube: Bing: