Hello Chatmodule Team,
I am user on the imesser chat module, and so i have some idears for the module. I am beginning with ddn programming, but I am a beginner in programming, so i think I can not help you. But I can translate the german language files for you if you want.
So here my feature idears:
Add a administration role for clean chat, ban users, add system massages ( like Welcome to dnnchat )
Add privat messages to a user
Add scroll enable/disable
Add badword list
different color for the users name
add chatroom list
registred user display as: Username, displayname, firstname, lastname
Add inactive user life tim
Message screen height and weight
Admin message color
Chat refresh time
add message time
Add open in a window ? So you can chat in this windows and go to other pages of the portal. 
Add login for anonymous users, add enable funktion for anonymous users.
thats it, for the moment. I hope that help you.
Best Regards
Matthias