This is really my first foray into using social networks - seen them since their dawning but always seemed a bit naff, IMO, but then I'm just not very social.
Feels to me like there's a layer missing perhaps though.. I'd prefer to selectively tag the kind of things I talk about and let people subscribe/unsubscribe to that as they wished (as I would have it on a blog), rather than assuming Fred wants to hear about my bellybutton fluff adventures just because he seems to smile and nod until I shut up about it, when really he only wants to see the pics of my sister.
I'm probably missing the point somewhere though.