I wanted to publicly post a very helpful bit of information that was given to me by our global moderator Sudharaka when I first began to use our visitor messaging system:
I found this tip to be quite helpful and wanted to pass it along to everyone.By the way, when you are replying to visitor messages don't post the reply on your wall but rather click on the "View Conversation" link on the message to which you want to reply and write the reply there. That way the reply will be posted on the other person's wall and a notification will be displayed. Otherwise, the person who messaged you won't have any idea that you replied, unless he/she visits your profile page. Looking at your wall it just occurred me that you might not be aware of this little point.