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Re:Pipe Viewer by bsg75 on Thursday May 24, 2012 @03:44PM (#4020182)
Filed under "How did I not know this?!", with credit to @hmason on Twitter.
Re:Pipe Viewer by pyre on Friday May 25, 2012 @08:19AM (#4023156)
It's been here before:

http://news.ycombinator.com/item?id=3626020

http://news.ycombinator.com/item?id=3198572

I'm sure there were older stories too. IIRC I saw it on HN longer than 6 months ago, but I couldn't find that submission in a cursory search.