The Hobbit Trilogy?

At Comic-Con a rumor was swirling that Warner Brothers was going to turn Peter Jackson's two film adaption of The Hobbit into three films.  Peter Jackson shot down the idea and said it was more likely that they would include additional footage on the extended editions of the films on home video.  Now it seems though they may really be considering a third film.  Apparently Jackson has shot enough film for almost three movies.  Almost means that some additional shooting would be required next spring in order to fill in what footage is needed to turn the two films into three.  It's likely this will happen because Warner Brothers won't turn down the opportunity to make even more money now would they?!