I picked up the Steelbook Blu-Ray Extended Edition from Best Buy. The Extended Edition is about 10 min longer with most notable addition being a scene from Hal's childhood. Problem is, the added scenes don't add much to the story that wasn't already there (I was hoping for more time on Oa and with Sinestro).
I haven't gotten through all the special features but they seem rather standard. I'll add on after I watch the movie on maximum movie mode. Did watch the deleted scenes, rather brief, maybe 7 minutes total.
I wanted to note that the digital copy included with the movie is not the typical download from iTunes/movie player but an interface called Ultraviolet. It is a cloud type player allowing you to play the movie from your Flickster account on your computer/tablet/smartphone. While you can download a copy to your hard drive on your computer, i am unable to do it on my tablet which is somewhat annoying (I normally watch the movies on planes when I can't access the internet)
Bottom line: The added footage won't change your opinion of the film. As a fan of the GL comics, I enjoyed the film. Though the films plot holes will prevent this from being a great film.
PS. Can't wait to try out my Sinestro Corps Batman skin Tuesday :-D