Google "Ponyo coupon" to find a printable $10 coupon. Hooray Disney!
I was in Costco on Sunday, and the selection of $9.99 and $12.99 BDs continues to expand. In the $12.99 section were
The Longest Day and all the Pirates movies, among other things.
Disney also has a Blu-Ray club now. Regular prices seem to be MSRP or close to it ("Starting at $30"), but the membership requirements are to buy 3 discs up front for $30 total with free shipping, then to buy 2 more at regular price (regular shipping is $4 for the first disc and $1.50 for each additional disc in an order). So that's 5 discs for $95.50, which could be a good deal depending on what you get.
disneymovieclub.go.com/webapp/wcs/stores/servlet/AcquisitionTermsView