In "The Exorcist" a young girl is possessed after using a Ouija Board.
http://www.youtube.com/watch?v=Tv6su7jMfiU&feature=PlayList&p=2618CDE8F8918DEF&index=2
(video of Ouija usage)
In 2009 Paranormal Activity was released. It tells the story of a man who tries to contact the demon that is possessing his girlfriend with Ouija use. http://www.youtube.com/watch?v=no8hAvjht4c
Witchboard, Radio Flyer, What Lies Beneath, and White Noise all also include Ouija use or possession.
