I found one item that fits the "DVR that works like a VCR" description--I needed a solution to the problem of DVD recorders that die after a year or two of service. The biggest problem is it's a discontinued item and it doesn't do high-def (I'm not on the HD bandwagon yet, and all of the old VCR recordings I want to convert are SD, so yeah). It's the
Archos TV+, and although it did at one time offer a subscription-based tv guide function (now defunct, if I recall corectly), it will happily function like a typical VCR without it, down to in-person recording or VCR-style programming. Oh, it also does MP3 and photos.
On top of that, it can be hooked to your home network, and has USB ports for connecting mass-storage devices to view, transfer or backup recordings. Although I haven't tried it, it's also supposed to let you perform rudimentary edits (like removing commercials) on your recordings, either overwriting the original, or generating a new file.
Although it isn't advertised as such, it will play Flash Video files, although like the Archos 5-series PMP's it's based on, I think it's limited to those with Sorensen/H.263 compression. I haven't tried it with H.264 FLVs, despite the format list on its Wikipedia entry saying so (which I feel is suspect).
Too bad Archos didn't hype the device's ability to function without a subscription, there may have been enough interest in it to warrant a HD version.
---PCJ