Just because you don't see a lot of other people complaining about lack of surround support doesn't mean we aren't here. I check in only occasionally because it seems Tablo has little interest in adding the feature.
I have two TV's currently hooked up to surround sound systems, along with two other TV's with streaming devices and no surround capability.
I'm actually interested in using a 4-Tuner Table IN ADDITION to my cable subscription, not in place of it. I find that I often want to record more than the two programs my cable DVR will handle, and at times two or even three of these are from broadcast channels.
That being said, there are two features that I will require before I purchase a Tablo for my home.
1) Surround Sound support - OTA broadcasts excellent sound. I will not put up with less than excellent recordings.
2) Playback while recording. I often want to begin watching a show before it is over, and catch up with the recording while it continues. Having to wait for a show to complete before watching the recording is a deal-breaker for me.