According to this TechCrunch blog
http://techcrunch.com/2013/05/08/mic...for-1-billion/, "Nook Media plans to discontinue its Android-based tablet business by the end of its 2014 fiscal year as it transitions to a model where Nook content is distributed through apps on “third-party partner” devices".
Could the Mother's Day generous sale on their HD/HD+ line a prelude to this wind down?