Nice! Yesterday I caught the price drop for Knights of the Nightmare, so I cancelled my first pre-order and put in a new one at the lower price. The reason I did this, is because Amazon has required me to contact Customer Service in the past in order to get the price difference for the drop -- which I thought was totally lame.
This time, thankfully, they've updated all of my pre-orders to the new, lower price.
I thought I'd share this for anyone else who has had issues getting price drops applied to existing pre-orders.