Hi, I live in the NYC area and just discovered this thread and I thought i'd drop some info.
I dont know if this was mentioned already but I did a recent scan and noticed that ION has set up shop on channel 12.1-12.2- and 12.3. They are working channels but I can barely get a decent signal to see what content is being pushed (picture shows up for 1sec. then cuts off). Though I am able to view for 1 second, I think that on 12.1, ION is broadcasting something different at this time while on 31.1 (their original ch.), its an infomercial. I hope to get a better signal to see whats going on. Logically, I would think its the same thing. Overall, im glad ION is moving closer because I am starting to like their content, especially the weekend movies.
Also, I fount a channel called 10/55 on channel 45.3. This channel is in SD and appears to broadcast dr.phil, wheeloffortune type of shows.
Whats strange is that next door to it, theres a channel listed as 45.13 (

) that appears to be working with a signal strength of 53 % but the screen remains black.
The antenna that im using is that 3yr old square box shapped RCA indoor antenna

and I am apparently 8.4 miles away from the empire state building.