New Line has yet to announce an official release date for the Extended Edition of Return of the King, but the rumor is that it’ll be December, and the exact date will be announced in the next couple of weeks.
More interestingly, here is an incredibly long list of the added scenes. Spoilery if you don’t want to know what’s going to be in it, but let me say this: wow. Almost every single major and minor scene that I missed will be included. This is going to be an amazing movie.