I've come to seriously enjoy Lisp development in Emacs, where with Slime mode you can get all sorts of information out of the inferior Lisp process. Perl has that information available through the B::* modules, but there's no Emacs bridge. Yet. I have hacked together some Perl and Emacs lisp, and was looking for some feedback on it from Emacs users out there. The install isn't automatic, since my hacked version of B::Xref, "Devel::Xref", isn't on CPAN, but it seems to work okay, and it seems useful. Give it a try.
(Update: fix two embarassing bugs.)
Update 2: Code removed. Please see sepia for the current version.