Create something beautiful or amazing or useful or wonderful with Perl. You can create something for other programmers (Perl::Critic is one example), but you'll get better reception if you build something that non-programmers can appreciate.
For example, Onyx Neon's publishing process relies on a lot of Perl to produce our books. We use a lot of free software to make camera-ready copy to send to the printer. The average person who picks up one of our novels in the bookstore might never realize this, but it's a business advantage for us and an ethical thing.
The flexibility and power of Perl and the CPAN have only helped our workflow. (We even have Perl 6 code in a couple of places.) Perhaps we could publish great books without Perl, but using Perl helps us do our work on time and on budget with great results.
Does your website announce this fact anywhere? I agree building things is a good way to show off Perl, but surely only if there are visible "built with ... " announcements somewhere.