In case you wonder why this submission doesn't get the up-votes and discussion you might expect, some of us have seen it before. Here are some of the previous submissions, some of which have discussion:

https://news.ycombinator.com/item?id=7727064 https://news.ycombinator.com/item?id=7263243 https://news.ycombinator.com/item?id=7149634 https://news.ycombinator.com/item?id=6953863 https://news.ycombinator.com/item?id=6504217 https://news.ycombinator.com/item?id=6234361 https://news.ycombinator.com/item?id=5804668 https://news.ycombinator.com/item?id=5728844 https://news.ycombinator.com/item?id=5728843 https://news.ycombinator.com/item?id=5695816 https://news.ycombinator.com/item?id=5377944 https://news.ycombinator.com/item?id=5129062 https://news.ycombinator.com/item?id=4586462 https://news.ycombinator.com/item?id=3507566 https://news.ycombinator.com/item?id=3503896 https://news.ycombinator.com/item?id=1475826 https://news.ycombinator.com/item?id=1327746 https://news.ycombinator.com/item?id=1310127 https://news.ycombinator.com/item?id=599164