I've held off on posting this since nothing has been confirmed, but I figure I can always edit in the confirmed information. It has a release date of December 4th:
Tentative extras:
- 2 Audio Commentaries: Rob Pattinson & Kristen Stewart; Stephenie Meyer
- Deleted and Extended Scenes
- Photo Gallery
- 6-Part Making of Documentary
- Jump to… Your favorite scenes
- Music Videos
- PIP Commentary (BD only)