Seemingly one of the primary
vectors for new
personas to
find,
browse,
grok, and ultimately
join Everything.
These handy superscripted question marks proliferate on /., a neighbor site of News for Nerds. Stuf that Matters. (What, you think the Everything Editors made that up?)
As of this writeup, they have yet to appear en masse outside of the subculture.
Furhtermore, as soon as you see one on eBay, you'll know those Perl Monks are getting some heavy attention.