Audio kinks seem to be worked out. They're broadcasting their AZTV feed on both 7.1 (AZTV 1) and 7.2 (AZTV 2), the latter almost certainly temporary pending the launch of RTN.
I noticed this too, as well as a PSIP map that includes a "7.10" which was marked "LONDEN." 7.10 is not a working channel, but an interesting find anyway.
As for 7.2, could they just put up a slide in memoriam of Ron Bergamo for the time being until RTN is up and running, or don't they have the capability to do so?