I specifically asked that and was told "yes." This is why I said earlier that I felt this would be something for me to have, ie to take my HDTV recording to the next level when the time comes. I asked about the JVC DVHS and that is when she said they will support all current day DVHS VCR's. While that answer may be inclusive, I realize that their is another (Mitsubishi) VCR out too but without becoming annoying and listing all VCR's she just answered with the inclusive type answer. Personally, I would ask specifically when the PVR is out before buying one if you own any model DVHS.
But in that same conversation regarding the PVHD1000 question, I was reminded that that VCR has 5C and if the PVR recording is "copy once" under 5C protocol, archive to DVHS tape would not be permitted. Makes sense, right? Basically, any program that is copy once protected would be seen by the PVHD1000 as a second copy with the PVR as the first. This would be true even for a DVHS connected to the PVR and attempting to tape a live program.
Explaining further- Using Macrovision as an example, you cannot route the video signal through a VCR to the monitor that has macrovision as the VCR would be affected by the macrovision signal. So, if you wanted to archive a tape of 5C copy once, you must make that tape direct from the tuner on 5000/modulator system and not connect the PVHD1000 to the PVR. If the program is "copy many" then you will be able to archive from the PVR. If the program is copy none as would most likely be the case for a PPV movie you won't even be able to time shift that and the PVR will be useless. The rep told me that the opinion of their people is that copy once may be the SOP in the industry of program providers. E* has no plans to institute 5C on their own. It will be a decision by the providers and E* will just pass it along.
I hope this more than covers your question, While I did not ask that much about some of the stuff that others seemed to be bothered with in this thread, I did spend most of my time with her discussing this issue to get a good understanding of how things might work in my situation (archiving tapes). I feel confident that unless they change the plan on this PVR that this is the way it will operate. Just remember that it is a product still under development and all specs and feature sets are subject to change until they reach the actual release version.