This topic has come up a few times: Four months ago: http://news.ycombinator.com/item?id=3383817 http://news.ycombinator.com/item?id=3383817 Nine months ago:

This topic has come up a few times: Four months ago: http://news.ycombinator.com/item?id=3383817 http://news.ycombinator.com/item?id=3383817 Nine months ago: http://news.ycombinator.com/item?id=2753471 http://news.ycombinator.com/item?id=2753471 A year and a half ago: http://news.ycombinator.com/item?id=1766439 http://news.ycombinator.com/item?id=1766439