I found press releases for 3 more DVD Recorders with ATSC tuners. One from
RCA (who have also announced an ATSC tuner for old analog TVs) and two from
Samsung. They are all going to be in the $250-$320 US range and will be available in the middle of 2007.
Edit: I also found
Panasonic's press release. It looks like all of their DVD recorders in 2007 will have digital tuners (other brands entry level machines seem to lack any tuner).
I should also note that all of these DVD recorders seem to record in either EDTV or SDTV but not HDTV.