There is a Internet Relay Chat (IRC) channel on the Freenode network (irc.freenode.net) used for support or development of Pure Data.
Address : irc.freenode.net
Channel : #dataflow

This is the main room for Pd-related chat. There is also discussion about other dataflow environments, like Desire Data, Max/MSP, pnpd, etc. You can connect with your browser here:

http://webchat.freenode.net/?channels=dataflow

If you have an IRC client, you can use this URL to connect with it: irc://irc.freenode.net/dataflow

Chat Meetings
Sometimes there are meeting held in #dataflow.

• you can read the chat logs here and here
• you can read the announcements

Recommended Apps

• GNU/Linux: Pidgin
• Mac OS X: Colloquy or Adium
• Windows: Pidgin
• Browser: Opera has a convenient IRC client built in