in reply to Killer Apps in Perl?
You might be able to count slash.
Like it or not, slashdot is the epicentre of Internet geekdom, where most of the proto-hackers (and some of the true hackers) congregate, or at least read news. I doubt that many of them haven't at some point thought "Wow! I wanna make my home page just like Slashdot!" (or perhaps "K3wl! 1 w4nn4 m4k3 my h0m3 p4g3 ju5t l1k3 sl4shd0t!") and come across the name of a certain practical extraction and reporting language.
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