It's better to link to just the past submissions with interesting discussions. Those appear to be:
2008 https://news.ycombinator.com/item?id=123489
2008 https://news.ycombinator.com/item?id=385068
2010 https://news.ycombinator.com/item?id=1293652
2011 https://news.ycombinator.com/item?id=2701063