Hi, your chat module is really useful but I found a little bug on it 
In fact, I use it on my DNN 4.7. I added it on DNN, added it on a page... and it crashed
At the first time, I thought that it was not compatible with DNN 4.7. But this not the real explanation.
The '\' on the Active Directory Account Name (Domain\samAccountName) provoque a crash. It says :
Error: 400 - There is an error on the XML document (1, 56).
I hope it will help you.