There is a #Perl channel on IRC (Internet Relay Chat) where Tom and Randal have been known to hang out. Here you can get immediate answers to questions from some of the most well-known Perl Hackers.
The perl5-porters (firstname.lastname@example.org) mailing list was created to aid in communication among the people working on perl5. However, it has overgrown this function and now also handles a good deal of traffic about perl internals.
Other resources at this site: