I've been using phpFreeChat for nearly half a year now, and I've absolutely LOVED it! Great product all --- thanks for your hard work!
As a site hoster/admin that's used the open source MyBB forums software (http://www.mybboard.net/) for about the same amount of time, one of my first projects when I set up my personal board was to tie together these two sweet open source projects.
The result: a MyBB plugin that integrates the phpFreeChat into any MyBB installation. (http://mods.mybboard.net/view.php?did=535)
This slick plugin allows an administrator to position a phpFreeChat session directly into their forum's pages:

or. it can be added as a link in the toplinks section that opens the chat in its own pop-up when activated.

The plugin even enables the administrator to allow individual users to position the chat session per their own preferences! (They can elect for a toplinks button or embedded in the page on an individual basis.)
The plugin also automatically logs users into the chat session with their appropriate usernames and privileges, based on MyBB's login information. (Users get user rights, admins and moderators get admin rights.)
Admins also have to control over 30 some-odd of phpFreeChat's features all through the simple use of MyBB's Admin Control Panel. It truly is a nice package. (For a full list of features, see the plugin's link: http://mods.mybboard.net/view.php?did=535.)
With the release of this plugin, phpFreeChat can now boast integration in both PunBB and MyBB. Hopefully good coders from all these projects will leverage their skills and this plugin to continue to improve all of these fine open source products.
Thanks for the good work all, and Cheers!
Ichibod