I've banged on before about how Perl is seen as less popular than it really is because the Perl community can be a bit insular. I believe that we need to get out there and tell people that a) we're still here and b) we're still wonderful.
As an example of that, we've started to ensure that all of London.pm's events are listed on Upcoming and we encourage people to register their attendance so that we can demonstrate how popular our meetings are. Recently, I also created a London.pm group to make it easier to track down our events. When adding events to our group, I also add them to a couple of other local geeky groups - which gives us a bit of free publicity. Maybe other local groups could consider doing the same (I see that some already do).
Today I also created a global Perl group with the intention of collecting all worldwide Perl events. If you create any kind of Perl-related event on Upcoming then please add it to the group.