SPChat v0.6.1b & SPChat v0.6.1b PrivatRoom-Fix
You'll need to register first and select English, there's a flag for Eng on the main page.
http://warpspeed.4thdimension.de/index.php
I tested this yesterday and it's pretty cool.
Here's the home page where you can demo it and download it I think.
http://www.saarport.net