Go for it, you will change history.
What is a DVD burner realy good for without a DVD back up program. The same is true for HD DVD burners. I have a Toshiba HD DVD player that up-converts DVD's and I have watched both up-converted regular DVD's and HD DVD's of the same title and HD DVD is way way better. You will end the HD DVD vs Blue Ray war if you make it a reality to back up HD DVD diks. DVD back up programs sold millions of DVD burners and if you make backing up HD DVD's you will be the reason people buy the HD DVD burners as soon as they are available. Capacity of the disks is mute as long as the movie fits. There are better ways then Blue Ray or HD DVD disks to back up computer files.We are currently working AnyDVD HD, and it will be an awsome product!
I have an early Alpha Version, and it decrypts any HD DVD disc I have tried. Even better, the first version will probably have a working "Remove annoying trailers..." function. Adios, FBI warning. And the 20 second Universal "HD-DVD is great" logo which you cannot skip is now gone for good.