Just to let you know, it doesn't take a lot of technical skill to make your own card. Then you can update, try new software, or format the card and install full Android to the NC itself without feeling like you wasted the $20-30 premium N2A charges above the cost of the card. Here is my "for dummies" version of the most popular method (the same method N2A used for their prototype):
http://taosaur.blogspot.com/2011/09/...m-sd-nook.html