[Codeflier]

What you are thinking about already exists: Google+. You can create circles and post updates globally, to an individual “circle”, or groups of circles. I have already seen a strong teenage migration to Google +. Therefore you can post things that your friends see, that your family will never see.

[The Shrew]

Thanks for the update. Help keep an old man from going Luddite.

Regards,

TS