Q&A lite plugin comments

Question

I am trying out the Q&A lite plugin from WPMU. It looks great except for one thing. It looks like users can only ask and answer question, not make comments on them. This effectively makes a conversation between two users very short. One question, one answer, that's it, excepting answers from other users of course, but there can be no conversation as such, which I find puzzling as to how effective it could be. Can anyone tell me if I am using it wrong? I think not but if I am I would like to know, otherwise can anyone recommend something similar.