ANA's 4th 787, JA807A (ZA104, L/N 41) is scheduled to flyaway on Jan. 10 around 6PM local time, according to the latest schedule, as NH9397. This means that the offical handover should occur within a couple days before that. This all assumes that there are no other issues with the aircraft.
There is still no word on delivery and flyaway of JA804A (ZA102, L/N 9) but thoughts are it should be in around the middle of this month.
Dominic Gates has a few more details regarding the delays in the 787 deliveries in his article that came out this morning:
Dominic Gates: Boeing delivers more, and less, in 2011