Anonymous Coward writes, at Some
details : Format: Ac- , Dolby, Dubbed, Subtitled,
Aspect Ratio: 2.35:1

Available Subtitles: English, Spanish, French
Digital 5.1), French (Dolby Digital 5.1)

Commentary by: Writer/Director Joss Whedon

Deleted scenes and outtakes

Future History: The Story of Earth That Was

What’s in a Firefly

Re-Lighting the Firefly

Joss Whedon Introduction

You can find and preorder it here,
as I’ve just done. Shiny!