I almost signed up for VOOM just before it went down. Well it's nice that at least their receivers are still good for more than being a door stop.
There was another company (I forget the name) I remember seeing some articles about a few years ago that only materialized in a few states. It had a box with OTA pay channels + a digital tuner but I think it failed in it's national rollout. I'm guessing due to money and delays in those digital sub channels being available to transmit their paid content. I almost bought that box just as a digital tuner (I think it was like $200 at my local Wally World) and instead I just bought a HDTV.