UPDATE: The flyaway (from Everett) should occur on the 4th for 805A and 807A which means delivery (formal paper signing and transfer of money) should occur by the 3rd of January.
Just got a message as well as saw a posting on an airliners.net forum that all three 787s that were due to be delivered around now have "gone tech" meaning there is a maintenance related issue with all three airplanes.
JA805A (L/N 31, ZA116) was supposed to depart Everett 2 days ago and is now schedule to be flown out on Jan. 4th in an evening depature. JA807A (L/N 41, ZA104) will fly out the same day a little later after JA805A has left(it was to deliver on Dec. 30th and fly out a couple days later).
JA804A's (L/N 9, ZA102) delivery was also scheduled for Dec. 30th (fly out a couple days later) but also cancelled though for unknown reasons. It is not known when it will be ready for delivery though this aircraft has flown as recently as Dec. 30th (as had ZA104).
Currently there are no other 78 deliveries scheduled in January but this doesn't mean that Boeing will not deliver any more beyond the two aforementioned aircraft. The situation is very fluid and it is unknown if the issues affecting these two aircraft is something more endemic throughout all the 787s or if this a one off situation.