Perl Mongers has provided us with a mailing list, which will be the "official" public mailing list for this group. You can sign up for this group directly at its web interface.
If you prefer a web interface, I've also set up a Google Group which mirrors and archives the content of the official list. It will forward e-mails sent to it back to the mailing list above. However, if you're signed up to the Google Group, e-mails sent to the mailing list will be moderated unless you are also signed up to the mailing list. Sorry about that; if anybody's got any smart ideas to avoid this, please let me know!