Yes. It has been on HN several times and it is about 8 months old:

http://news.ycombinator.com/item?id=1981370 (239 days ago)

http://news.ycombinator.com/item?id=1986921

http://news.ycombinator.com/item?id=2003817

http://news.ycombinator.com/item?id=2629937

http://news.ycombinator.com/item?id=2712978

Dupes are very common on HN nowadays, despite some people claiming they're not :-)