I saw it and it's truly gorgeous. Big and beautiful. I didn't pick mine up because I really didn't want to lug a 5-pound book around the con with me. But I did look through the sample copy they had and loved it. Lots of fans were doing something really smart - getting their autographs on the slipcase. That's gonna look *great* on their coffee tables!
I don't know if they'll be available for purchase or not, but at the B5 Bingo/Stump the Editor panel, there were a few framed prints of some of the pages as prizes. My fave was of John and Delenn embracing for the last time. I didn't win at Bingo and wasn't allowed to play Stump the Editor
but that would have been my chosen prize.