Let's be honest, the real question should be : "Why isn't slashdot running the everything engine?".
Further, I think it's silly statements like "we are supposed to be the Perl community site. Shouldn't we have foo?" that do more damage than good. Sure it starts with something like journals, but then it's perl fruit baskets, and then something truly ludicrous like perl thong underwear.
Why change for the sake of change, or going with the popular crowd? I don't think slash would be as ameniable to perlmonks as everything already is.