I'm going tonight to see if I can't get my hands on the DVD, with my handy $5 coupon, and said rebate! Go here to print the coupon, and then go here to print the rebate. There is also a $10 off coupon on the same page if you buy the Blu-Ray instead, stacked with the $4 rebate makes a total $14 off the Blu Ray version!
Here's a price list for a few stores in the Long Beach, Ca. area according to their weekly ads.
Target: $15.99 (-$5Q=$10.99!) (-$5Q & $4Rebate=$6.99!) <------BEST DEAL I'VE FOUND!
Ralphs: $19.99 (-$5Q=$15.99!) (-$5Q&$4Rebate=$11.99!)
Best Buy:$16.99 (-$5Q=$11.99!) (-$5Q&$4Rebate=$7.99!)
Please let me know if you've found an even better deal on this!