Re: [social media] ... what you just posted on is part of it.
I tend to agree ... but also not agree.
Early internet "social media" were (at least in my experience) just that, /social/ media: e.g. usenet was based on groups, irc had channels, etc. You might have thrown your ego about in such forums, and some were admins or moderators, but essentially the forum was about the group or social interest of those who turned up and posted/talked there. Like these ElReg forums, mostly.
In contrast, what is now called "social media" tend to be explicitly about ego: e.g. /my/ twitter feed, /my/ facebook page, /my/ blogcast, &etc. So I'd rather call it "Ego media" rather than "social media", but my one vote counts for little, especially since I don't have a twittr account or whatever. So these forums don't really fir into "social media" in the contemporary sense.
Hang on, I've got an idea. Maybe I should start up a blogcast (whatever that is :) entitled "Clog Blast", since that sounds superficially amusing. But what should it be about? 
 Well, about *me*, obviously :-) ... and ...er... clogs?