All the discussion: http://news.ycombinator.com/item?id=477879
Also posted:
http://news.ycombinator.com/item?id=478433
http://news.ycombinator.com/item?id=478264
http://news.ycombinator.com/item?id=477885
http://news.ycombinator.com/item?id=477862
and possibly more by now.