I dugg up some information that HD-DVD encryption has been cracked. Not much is known but here are three links you’ll need to know if you want to try backing up HD-DVDs (how sweet, right?)
Link 1: Doom 9 Forum Thread
Link 2: Youtube video showing “proof”
Link 3: The Program in .zip
So if you have an HD-DVD drive in your computer, get on this and start making scene releases of HD-DVD movies!