By the way, you won't find something like this for SACD too -
http://dvd-audio.sourceforge.net/
And, I have Dark Side of the Moon (recorded from the master tape) on DVD-Audio (5.1 channel )and love it! It was given away freely and I can tell you how to get it if you plan on picking up a DVD-A player.
-S
PS. Ever noticed the Audio folder on your DVD movies? Now you know what it is for.