Google's "Costume Wizard" tool is back for Halloween. It lets you choose how spooky and unique you want your costume to be, and then spits out the perfect costume based on Google Trends data. Check it out at Frightgeist.WithGoogle.com. Just look for "Costume Wizard" in the top left corner.
It's downright spooky how well Google knows me. It said I should be Dwight Schrute. So yeah, a total nerd.