In looking over the manuals and spec's at vizio I do not believe this TV is DLNA certified. You do have an app bar called V.I.A. Dock it may be that at sometime an app might be able to be placed on it but that may depend on Vizio [not sure]. You could look there and see if there is any reference to the HDHR DMS. There have been a few reports of that happening on other TVs but they were DLNA compliant and showed up in a DLNA list too. I do not believe any app reference has opened a channel but the channel list was given.
I know for a fact that my TV does support DLNA, i have other devices (NAS, Media Server, etc.) that can be seen by my tv. My only question is how to determine if my tv does or does not support DTCP. Is there a diagnostic tool to test this out?