Just to point out, this was previously submited to HN and for some reason, unknown to me, became dead. There is a good load of comments on there still: http://

Just to point out, this was previously submited to HN and for some reason, unknown to me, became dead. There is a good load of comments on there still: http://news.ycombinator.com/item?id=571447 http://news.ycombinator.com/item?id=571447