If we take your idea and added a mechanism that plays new episodes (from those pre-selected series) at a user-designated primetime showing, I think we would have a winner.

Why can't one of these services just give us our own legit pseudo-channel? (Hulu???) BTW, you can sort-of do this with a combination of XBMC, a few plugins (mainly pseudoTV), Couchpotato, Sickbeard and a good tracker, but it is way too much of a headache to setup and maintain.