Max Power wrote:

Has anyone attempted to 'moonbounce' or EME ATSC UHF band TV signals, in the UHF band allocation?

I don't know of anyone who's done it with ATSC signals.

A TV DXer in Australia has DXd analog carriers via moonbounce.

http://www.geocities.com/toddemslie/moonbounce_DXTV.html
http://www.geocities.com/toddemslie/UHF-EME-TVDX.html

What such a test could accomplish:
1. Find out if ASTC error correction can survive EME, enough that is to get a station ID.
2. Find out what 'emergency utility' such a communication system might possess.
3. As a propagation experiment.
4. As a test of a radio astronomy network.

The signals do not appear to be strong enough to even deliver sync buzz, let alone decodable data.  A larger antenna would help but with these wide signals I doubt one would reach decodability.