Here are some earlier submissions on this and similar topics: http://news.ycombinator.com/item?id=1500564 http://news.ycombinator.com/item?id=1500564 <- This h

Here are some earlier submissions on this and similar topics: http://news.ycombinator.com/item?id=1500564 http://news.ycombinator.com/item?id=1500564 <- This has lots of comments http://news.ycombinator.com/item?id=1491252 http://news.ycombinator.com/item?id=1491252 http://news.ycombinator.com/item?id=1175576 http://news.ycombinator.com/item?id=1175576 http://news.ycombinator.com/item?id=1011716 http://news.ycombinator.com/item?id=1011716 http://news.ycombinator.com/item?id=726110 http://news.ycombinator.com/item?id=726110 <- This has lots of comments