Ask HN: Have any good flash card decks to share?

Was just listening to this great Mixergy interview with Derek Sivers. http://mixergy.com/derek-sivers-blog-interview/

He mentioned the idea of using flash cards and the Spaced Interval technique to learn business books like The Personal MBA and wished someone would turn that book into a flash card deck.

Got me thinking, are any of the good people of HN doing this? Have any good business and programming related decks to share?