What about a way to comment on different websites and control who gets to see those comments.  Audio comments, text comments, video comments,… I can see my mother’s comments and she can see mine.  I can see James Spillane comments on Chris’s weblog and vice versa however a random visitor to the website cannot.  I can look in my mother’s profile and see recent websites that she has commented on.  And read or listen to those comments.  Read, watch, or listen, I can make all of my comments publicly available and people can follow me around on the Internet and see what I’m talking about.