I just got the Vizio Co-Star. I have a Netgear ReadyNAS NAS backup box. I have lots of media on the drive (movies/TV shows). All the media is in mp4 streaming format (header info at beginning of file). I have the ReadyNAS DLNA server and the ReadyNAS webserver pointing at the media. If I open Chrome on the media I get a file listing. If I select a file it starts playing right away so I know the media is good. Also, it plays fine from my WDTV Live media box. The Vizio Co-star does not come with built-in DLNA. I searched Google Play with the words "dlna player" and I got about 14 apps. I tried an app called aVia and it found the DLNA server and media. When I try to play it it says it cannot. Rather than try them all I was looking for a recommendation. Personally, I think GoogleTV should come with built-in DLNA support or at least Vizio should provide it. BTW, I did all the updates.