Have come across a collection of basic college textbooks that appear to be more or less based on text from Wikipedia. There are 21 of them. The company claims that they are being used by more than 2 million students.
They are under a CC BY SA license and if you follow the links seen here http://books.google.ca/books?id=7avpAAAAQBAJ&pg=PA2058 they do eventually attribute Wikipedia.
They are being offered for free on amazon.com http://www.amazon.com/s/ref=nb_sb_noss_2?url=search-alias%3Daps&field-ke... and are being sold for $19.99 on their website. https://www.boundless.com/
So the question is should we have a response? I think this could generate position press for our movement. Attribution could be better (I would consider theirs to be borderline). Additionally should we be adding this textbooks to Wikiversity or Wikibooks to make sure they stay free available?