Well, I just got it.
picked it up for the same price the original release single Dvd was...in the states its 20$ for dvd, and 35$ for Blu Ray at Wal-mart.

Upon removing the top slip cover and un wrapping the box, you're greeted with what is best described as a Hard cardboard, Slip cover and a case similar to a Hard back book. ( imagine the special editions of hard back books with a cardboard slip cover to protect them with one opening length wise to slide the book into.

The "hard back book" portion of the case comes with three 'pages' each of these pages has an insert that slides into them "hidden" in the thickness of the 'page' with one of the 3 Cd's inside. one complaint is that the cd's have no actual plastic snap ring to hold them in place, so some care is required to keep them in good condition. but the box is made so that it holds them securely when one is careful with insertion.

The artwork on the 'book ' portion is lovely. really shows off the cg of the movie and compliments it well.

I haven't watched either version of the extended release on the dvd yet, But it comes with original Theatrical Release, Collectors Extended cut (16 min additional footage) and also Special Edition re release with 8 minutes of additional footage.

a "message from Pandora" i have not viewed yet. and special features on the 3rd disk are "New / additional scenes"
"deleted scenes"
and a documentary on the making of the movie.

Also the features all include a "optional family audio track" with all objectionable language removed, for those that are inclined to watch with their children.

In all, without having viewed the movie its self in this form, i say the collectors edition is worth the 20$ if you are considering the purchase. I saw somewhere also that a portion of the proceeds are going towards the Avatar project, which James Cameron started as an initiative to plant and have adopted 1,000,000,000 trees across the world, a worthy cause i would say.

I'll report back on the extended releases once i watch them
Hope this helps anyone considering the purchase
G-man