No.   We've written jPFChat as a component, and it displays as any other Joomla component does... in the content window.   There may be 3rd party scripts out there that allow you to display a component in a module location.  If there are, we've not tested them.  We've not even tried them.

We didn't write the phpFreeChat script.  If you're into it... feel free to download your own copy of the phpFreeChat script (phpfreechat.net) and have a go at writing the chat into a module.   Then, let us know and we'll send anyone your way when they ask this question.