Rabbit Hole was released on DVD and Blu-ray in the US this past week (April 19th, to be exact). It goes without saying that this is a must-see! Extras on the DVD are Commentary by director John Cameron Mitchell, two Deleted Scenes, and the trailer. You can order your copy on Amazon.com.
Rabbit Hole gets a DVD release in the UK on June 20th. I’m unsure of further international DVD (or even theatrical) release dates, so let me know if you have heard of dates for other countries.