Last night I experimented with Plex and "Channels DVR." Plex had issues mapping guide data for several channels. "Channels DVR" was difficult to configure and I never could get it to play a live stream. Thankfully, both of these services came with one-month free trials, so I'm not out any money.
Now I'm going old school for one last attempt at this. I wiped the HDD on my test PC and installed Windows 7 Pro. Have a few missing drivers to install tonight when I get home from work, then I'm going to see how WMC performs with the Quatro.
If that fails, I'm going to get a Tablo and experiment with that.
It's too bad nobody has capitalized on the current resurgence of OTA viewers by making a user-friendly STB/DVR that actually has all the features of traditional services like Dish and Direct. Every one of these half-baked OTA devices has something major missing. I want to see a comprehensive, user-friendly, full feature STB with a reasonable monthly fee that doesn't also butcher the video through heavy transcoding. If the AirTV wouldn't delete my timers every day, and if it had the ability to search the OTA program guide, it would be a winner.
Surely this can't be too difficult; you need a tuner, a program guide provider, an on-screen GUI, and a way to power an EHD. Why hasn't anybody done this?