I was just at the official Stardust website, which updated its splash page for the DVD release. It now includes a link on the front page to a $5 off coupon for the DVD (valid in both the U.S. and Canada, through seperate coupons.) It makes no mention whatsoever of HD-DVD, so I'm not sure if it's valid for that as well, but I figured it might help somebody. I'll be using it on Tuesday. Since I'm guessing this one will run for $19.99 or so due to its lower boxoffice, it's nice to have this price get a little lower:
http://www.stardustmovie.com
Offer expires January 15, 2008.