I'm doing similar for the Nook Color and Tablet but I purchased the micro SD cards on Ebay with Android already on them. I got 16GB ones but they had 32 as well.
I could make my own but don't feel like it I guess.
I saw those, but the larger N2A cards for the tablet are more pricey than one you could make yourself by buying a mini SD and downloading the file for it. Plus, the cards ready to go are only class 4 speed.