Yeah, I noticed that too. I asked on a Amazon.com thread on Anime on DVD, but no one replied. Meh.
To be honest, I think Amazon.com is confused right now because they never changed their November 30th release date to December 14th.
Also, if what Hikuro said holds true... and if Bandai really is asking retailers to pay up, then it is ready for it's release.
Lastly, keep in mind that the delay that pushed it to the 14th was an act of god of sorts. Bad weather struck, and it screwed up their shipping order. And news of that delay was broken by Jerry Chu on Anime on DVD the day it happened. I highly doubt that Amazon.com "knows something we don't" if they didn't even manage to hear about the rescheduling to December 14th.