dupe: http://news.ycombinator.com/item?id=1460896 http://news.ycombinator.com/item?id=1460896 http://news.ycombinator.com/item?id=1469520 http://news.ycombinat

dupe: http://news.ycombinator.com/item?id=1460896 http://news.ycombinator.com/item?id=1460896 http://news.ycombinator.com/item?id=1469520 http://news.ycombinator.com/item?id=1469520