There is a $10 Beauty and the Beast Diamond Edition on DVD/Blu-Ray coupon that is now available on Disney Movie Rewards! To get your coupon, you will have to own a previous version of the movie (or have access to it).
Just head over here and register/sign in. In the Magic Code box, type in the UPC code from a copy of Beauty and the Beast. Make sure you type all the numbers including the smaller numbers. After you type it in, you will see the above banner. Click on it and you will be redirected to print this coupon. The coupon is good until 10/9/10. This movie is set to release on 10/2.
(Thanks Kristen!)