I ran through a quick demo of this at ETech last month, but now Perl for Series 60 can be yours to hack on as well. See the post Jarkko made to perl5-porters for more details.
Unlike Python for Series 60 the Perl port comes as-is, with no support and limited access to the device itself. But... you've got the source code.
-- [Update: 2005-04-22] There's now a SourceForge Perl for Symbian project!