There's a great deal of discussion about this from the last time it was submitted: http://news.ycombinator.com/item?id=2015134 http://news.ycombinator.com/item

There's a great deal of discussion about this from the last time it was submitted: http://news.ycombinator.com/item?id=2015134 http://news.ycombinator.com/item?id=2015134