Barnes and Noble (NYSE: BKS) shares plummeted Thursday after the company said it expects EBITDA for 2011 to be $150 million to $180 million, down from a month ago when the company said it expected EBITDA at the low end of its previously forecast $210 million to $250 million range...(Click the story link or go to http://www.marketintelligencecenter.com for the full story)