hmmm..hope it will be possible sometimes
other small issues:
1. if i enable guest comment moderation then i get after release a JS Activity Stream wich shows the time where the comment was moderated/released, but not the time where the guest comment was originally added to Blog entry!?
2. if the moderator release a guest comment and the blog is in the meantime unpuplished then is the guest comment nevertheless visible in JS Activity Stream!?