Was it released on Blu-ray at an earlier point, somewhere in the dim dark past? I can't remember. [Update: it was. Thanks to Bryan for confirming.] No problem, though, cos Adaptation will be coming to Blu-ray later this year thanks to Shout! Factory:

Bonus Features:
· Original Featurette
· Trailer
· Still Gallery

So nothing new, but if you need to update or upgrade your collection of CK paraphernalia, this one's for you!