Peter Jackson just confirmed on Facebook that "The Hobbit" will now be three films:
It is only at the end of a shoot that you finally get the chance to sit down and have a look at the film you have made. Recently Fran, Phil and I did just this when we watched for the first time an early cut of the first movie - and a large chunk of the second. We were really pleased with the way the story was coming together, in particular, the strength of the characters and the cast who have brought them to life. All of which gave rise to a simple question: do we take this chance to tell more of the tale? And the answer from our perspective as the filmmakers, and as fans, was an unreserved ‘yes.'