I have searched for days on any documentation online and I haven't been able to find any solution. I've signed up for a dev account with B&N and I've added the Nook_Tablet_Addon to my Android SDK. When I try to publish from FlashDevelop I get error: Device Not Found

What steps am I missing here?

Maybe try first launching a sample Java Android project from Eclipse on your device. Then if it works it should be ok with FD.

I recently found out you have to put the Nook into "Dev Mode". This can only be done once you've been approved by their developer application process. I'm waiting now on that approval. I will share my results after.