BackupHDDVD is basically a tool/software that supposedly "decrypts and dismantles AACS on a Windows PC -- just feed the small utility a crypto key, and it'll dump the video right off the disc onto your hard drive, supposedly playable in any HD DVD compatible player." More information. Video after the jump.
If true, this would instantly become the DeCSS of high def optical, as AACS is the copy protection scheme used not only by HD DVD, but by Blu-ray as well
