Joe, thanks for catching my error on N820UA - it's fixed and matches the other 54 319s.
N210UA was in SFO 11/10-17/2014, then ferried to HKG for over a month to get WiFi. Flight Amenities says all rows have power. Probably received power in HKG. Just checked and no other Hawaii 772s have power, but N214UA has been in SFO since 1/6/15. Who knows if it is getting power now.
As far as 753s, N75853 was showing to exit MCO 1/10, but that flight now has another aircraft assigned - #3853 showed WiFi nad it should be only good over the US since looking at United page on WiFi, it states that DirecTv aircraft only receive WiFi over the Continental US - If that is correct, the 753s with DTV can only receive over the US while other 12 units (Former ATA) should have International WiFi. The 753 flies a lot of Hawaii, so when completed, 9 of 21 will not get WiFi over the Pacific.
738:
N73256 sked to exit INT 2184/10Jan with WiFi, slimline seats
N79279 sked to enter INT 2120/10Jan for WiFi
N33292 sked to exit INT 2121/10Jan
N39297 sked to enter INT 2122/10Jan for WiFi
739:
N77430 entered INT 2154/8Jan for WiFi
N69839 exited INT 2155/8Jan with WiF, possible scimitars
744:
N117UA sked to enter XMN 2149/11Jan, aircraft already has power
N118UA sked to exit XMN 2148/11Jan with In-Seat Power
772:
N214UA entered SFO 1/6/15, potentially for ISP