Now that I think about it, there is one other option that I remember, but it is of no value to electrocutioner or WoodButcher as it is not an STB. Therefore it is of no value to anyone with an existing STB - only those who are considering a purchase of a HDTV and would like to go OTA that is.
LG had 50" & 60" plasmas with ATSC tuner and integrated 160 GB hard drive DVR - 50/60py2dr & 50pc1dr are the model #'s.
I don't remember anything about their actual quality/capabilities though - either the plasma HDTV or the integrated DVR. The first two are older models now and they were very expensive when they first came out in the US. At the time they were high-end models. The 50pc1dr was considered a lower model. If I recall they weren't immediately available in Canada and I don't recall ever seeing them in a retail store here.
Just posting this here since it deals with OTA PVR options.