Ok, so here's the deal:

Amazon currently lists the blu-ray for $19.99; however, these 2 promotional codes were working at the same time earlier this week to lower the price to $9.99. Right now Amazon will only let you enter one code at checkout, bringing it to $14.99, but if you e-mail customer service afterwards and explain the situation, and that you know it worked for others and would like the discounted price, they should give you the $9.99 price, plus shipping. I know this works cuz I just did it.

Here are the two codes:
sonypic5
ghostblu

Thanks to NR1 at GBfans for pointing this out!