Haiku are the Perls
of the literary world:
short, dense, and priceless.
So it comes as no
surprise that they're popular
with Perl programmers.
Heck, all I know is that Damian Conway (author of the Coy module and founder of this Perl/haiku craze), along with fellow judges Elaine Ashton and Mark-Jason Dominus, are holding a Perl Haiku Contest. Rules and entry form are there, so go haiku or something.