Another cinematic time suck for you folks: Name That Film. I'll let the Brainiac explain:
Everybody I know is playing "Name That Film" this week.
How does it work? Visit the NAME THAT FILM Pool at Flickr. The pool was started by Flickr user BarelyFitz, among others. Flickr users are invited to post unidentified movie stills to the pool; they're also invited to post their guesses about which movies other users' stills are from. When someone guesses correctly, the film's title is added to the photo as a tag.
As of this posting, the pool has over 1,300 members and over 9,000 images.