I thought I'd seen this before - here are some related submissions: http://news.ycombinator.com/item?id=1675699 http://news.ycombinator.com/item?id=1675699 ht

I thought I'd seen this before - here are some related submissions: http://news.ycombinator.com/item?id=1675699 http://news.ycombinator.com/item?id=1675699 http://news.ycombinator.com/item?id=1006464 http://news.ycombinator.com/item?id=1006464 http://news.ycombinator.com/item?id=971878 http://news.ycombinator.com/item?id=971878 http://news.ycombinator.com/item?id=963653 http://news.ycombinator.com/item?id=963653 http://news.ycombinator.com/item?id=943486 http://news.ycombinator.com/item?id=943486 http://news.ycombinator.com/item?id=940636 http://news.ycombinator.com/item?id=940636 http://news.ycombinator.com/item?id=939938 http://news.ycombinator.com/item?id=939938 <- This has lots of discussion. http://news.ycombinator.com/item?id=939149 http://news.ycombinator.com/item?id=939149 http://news.ycombinator.com/item?id=938841 http://news.ycombinator.com/item?id=938841 http://news.ycombinator.com/item?id=938413 http://news.ycombinator.com/item?id=938413