Preivous discussions: http://news.ycombinator.com/item?id=1138707 http://news.ycombinator.com/item?id=1138707 http://news.ycombinator.com/item?id=143333 http:

Preivous discussions: http://news.ycombinator.com/item?id=1138707 http://news.ycombinator.com/item?id=1138707 http://news.ycombinator.com/item?id=143333 http://news.ycombinator.com/item?id=143333