Does DVDFab support the back-up of HDDVD? If not, then does Fengtao plan to?
Also, since DVDFab compresses video files to fit on 4.7GB DVD discs, does video quality suffer when upconverted to near HD in an HDDVD player?

No, and probably will be extremely difficult to develop because the encryption is significantly more robust. In addition you’ll need a new burner, etc.

Do a google: here is one example: http://en.wikipedia.org/wiki/HD-DVD

Thanks man. That was a very informative article. It will be interesting to see how it all “plays out.”