The latest version of this module is now on Drupal.org:
https://www.drupal.org/project/phpfreechat
This is the integration module for Drupal 6. There is now a Drupal 7 version as well.
This site is running a later version of the Drupal 6 module than is currently on drupal.org because I haven't figured out Git yet. The code has been greatly cleaned up and many bugs have been fixed.
* The blocks are now working: You can configure a "Who is chatting" block to show all people in all the chatrooms, or you can show up to two separate chatrooms (e.g. Who is chatting on [chatroom-name]).
* The per-node configuration options didn't use to work. Now they do.
Those are the biggest changes. For all the details, see the README.txt file. The source code can be found here:
This Drupal installation is main a test site for the Chatbox, which is a Drupal 6 module for integration of phpFreeChat.
Spam registrations became so overwhelming that had to delete over 4000 spam registrations, so now this site is secondarily a test of how well the new spam block software I'm using works.