That does sound really good. Not only would it make the JCJP community stronger, it could also give another way to learn material. Honestly if I had friends to talk to everyday on this website, that would help keep me from lacking on my Japanese. In other words, I wholeheartedly agree.
It's been a long time I want to implement chat on JCJP. However there are some considerations before it.
I am still finding the best way to do it, because I also want to implement interactive quiz within the chat too. Something like, where there is a bot asking questions, and someone who gives a correct and fast answer gets the point.
Thinking about the server capability right now, I think it is still kind of difficult to implement those. However, I will try to start developing it.