A quick post to the PEAR blog today points out two groups that, whether you're a PEAR user or not, you might want to be a part of - one on LinkedIn and the other on Facebook.
These groups are primarily for fun, but also act as networking tools to get to know the people who are developing and using PEAR. The official support channels for PEAR are still the mailing lists and bug tracker, and are listed at http://pear.php.net/support.php
To find either, log into your account and search for the term "PEAR". It'll be on the list.