I have made an integration class for FlashChat 4.4.2 integrated with PunBB 1.2.10 
You can read more about FlashChat and test the Chat demos and purchase FlashChat for $5 here http://tufat.com/s_flash_chat_chatroom.htm
The $5 fee includes lifetime updates and free support in the Forum http://tufat.com/forum/forumdisplay.php?f=5
If you don't want to pay $5 you can earn clicks and use them for getting the FlashChat script http://tufat.com/affiliates.php
The first copies of the FlashChat/PunBB integration will be made available for interested PunBB users after a PM to me (Veronica) in the FlashChat Forum