Why limit it to Perl? Check out some of the hot new frameworks like Django (Python based) or even Rails.

PHP is the language of choice for Web development these days and you will have a much better chance of finding a job knowing these than if you only have Perl under your belt.

I love Perl, and not predicting it's demise, but it is no longer the darling of the Web. Heresy here at the Monastery? Maybe, but it's the truth in Web land where I leave daily.