Details from movie viral.com - see site for more:
"...A new poster will debut to mark the 100-day countdown to the release of The Hunger Games (can you believe it?). But its not as simple as clicking a few links. The poster has been divided into 100 pieces and spread across the internet. Fans (this is where you the reader comes in) will have to collect 100 pieces of the puzzle in order for poster for The Hunger Games to be revealed. But how do you locate these pieces?
Well to collect these pieces, fans will need to search twitter for the #HungerGames100 hashtag. Once they collect all 100 pieces of the puzzle they will be able to upload a photo of the poster to their Facebook page. Don’t forget to tag the official Hunger Games page when you do. Twitter is a vital part of this viral game, and you will need to use the site in order to play. Below is our very own piece of the puzzle, 25/100, that you can use as a starting piece before your search for the other 99 begins. And here is the link to that piece. Refer to the official Hunger Games Facebook page, if you are having trouble with any of the links."