I agree, a FAQ or introduction will be necessary if this is going to be used by many. Perhaps I will make one after I have a little experience myself in this.

I guess a good start in using it would be just to say hi, rather chat in text form so that people doing their work don't have to be disturbed and can respond at the time of their choosing (besides the risk that they might have sound turned off).

Then after someone responds (I don't think it would take too long if people are online) would probably follow a short introduction and chat about what you and the other person are working with, what you would like to do, perhaps mutually agree that you will update each other regarding process. After that follows naturally work in silence (unless you work together).

Technically - I've had a couple issues too, but once it's started it has worked fine.