In Alexnoe's FAQ
Are there dual layer recorders?
Not yet. The German magazine "C'T" (the only serious one at all) has once stated that Verbatim and Ricoh are working on it, but there is no official info available on this.
Does anyone have any more information on this? I, as probably many others, would jump at the chance to backup, 1:1 [absoloute] my pressed DVDs.