We're not adding plugins to the site for random chat, talk, or whatever. This has been suggested and shot down before (not this particular site, but the idea).
To clarify:
I've always been told, especially from the repeatedly-locked past topics on site plug-ins, that we just don't implement things like this regardless of what it is. Opening this thread is inviting discussion that will only lead to disappointment, I feel, but if you really want to talk about it, I guess you can go for it.