Thanks for finding that!
Did any one look at the picture of the cancelled siege book. It is a pic of the barnes & noble website. While it is interesting that at one time had a listing that never quite made it, the thing that intrigued me was the price. A whopping $125.82! They must have been planning one heck a book...more like the Encyclopedia Brittanica!
Here is the link to the NJO cartoon these guys are trying to make. Not much there right now, but I hope they come up with something cool.
Star Wars: New Jedi Order - The Unexpected Covenant & The Voice of Treason Cartoon Movies