No kidding?John_Picard, I know that TiVo works off an antenna, so you can record off terrestrial TV. Also a lot of cheap non-subscription DVRs over here in the UK work for Digital TV via an antenna, so I suppose if the signal is strong enough in your area then you could use one of those types if they're available in the US at any point.
I was told a DVR wouldn't work, so I gave up my quest to purchase one. Thanks for the info! However, this comment makes no sense:
Why wouldn't people without cable use a DVR? They'd need a DVD player to play rentals, because you can't find VHS rentals. ...