Why don't you people go talk the the developers for Plex
and get them to build a Plex Client for their server software. If you did then you would have not only the ability to seamlessly display all the content one has saved on a computer or NAS but also all the channels they offer as well (and side-stepping many of the license problems with direct apps, such as hulu), since they are actually being accesses through a computer and not the TV or Tivo.
I really want this. No developer at Plex has picked up the idea because of the cost factor of purchasing a tivo and license. Maybe you can give them the stuff they need and allow them to SELL their app for a small fee. They get $5 for their appletv app and it is great.
I really want just 1 box I can display all my media with (and 1 remote) please!