See http://news.ycombinator.com/item?id=135494 http://news.ycombinator.com/item?id=135494 for a previous discussion on this topic and http://news.ycombinator.co

See http://news.ycombinator.com/item?id=135494 http://news.ycombinator.com/item?id=135494 for a previous discussion on this topic and http://news.ycombinator.com/item?id=135575 http://news.ycombinator.com/item?id=135575 for my previous recommendation.