The source has details about the Italian DVD, but the extras are the same of the US DVD/Blu Ray.
DVD
Disc 1
The movie
Audio Commentary with Bill Condon
Disc 2
6-Part Making Of Documentary (55 minutes)
Jacob's Destiny (7 minutes)
Edward & Bella's Personal Wedding Video (9 minutes)
Edward Fast Forward
Jacob Fast Forward
Jump to... (character specific favorite scenes) according to the Italian DVD: wedding, honeymoon, Bella's pregnancy, the wolves, the Cullens
Blu Ray
The movie
Audio Commentary with Bill Condon
6-Part Making Of Documentary (55 minutes)
Jacob's Destiny (7 minutes)
Edward & Bella's Personal Wedding Video (9 minutes)
Edward Fast Forward
Jacob Fast Forward
Jump to... (character specific favorite scenes) according to the Italian DVD: wedding, honeymoon, Bella's pregnancy, the wolves, the Cullens
If you haven't already, pre-order the DVD or Blu Ray here.
Thanks to @melcitron for the link.