Supernatural Season 4 DVD is expected to be released September 2, 2009. It will be a 6 disc DVD set. More details on the special features as soon as I find it. There will definitely be a gag reel, most of which will focus on the episode Yellow Fever.
Terminator Sarah Connor Chronicles season 2 DVD is available for pre-order at amazon.com. More details on special features coming soon. 
A theatrical-edition DVD, a “Killer Cut” DVD and a Blu-ray of the new Jason adventure, directed by Marcus Nispel and starring Jared Padalecki and Danielle Panabaker, will all be released June 16.The theatrical DVD will include a widescreen transfer, and the “Killer Cut” edition will contain an extended version of the film (running eight minutes longer) along with a The Rebirth of Jason Voorhees featurette and “Slashed Scenes.” The Blu-ray will sport both cuts of the movie and those two extras, plus: ....
• Terror Trivia Track, including exclusive making-of picture-in-picture footage
• Hacking Back/Slashing Forward featurette on the original FRIDAY
• The 7 Best Kills behind-the-scenes featurette.
MY BLOODY VALENTINE will be released on May 19, 2009, Both the DVD and the Blu-ray will include the 2D and 3D versions of the film. As for the supplemental features expect the following:Audio commentary
Deep Inside My Bloody Valentine featurette
Sex, Blood and Screams featurette
Deleted scenes
Gag reel
Digital copy
Four pairs of 3D glasses
