Spacers blog and respond by commenting all the time: isn’t that brilliant? Facers microblog all the time. Its the status update, right under your pic. They can also edit status by mobile, and you can subscribe to notifications by RSS feed: that’s microblogging! Love or hate the two platforms, they are unconsciously bringing radically new concepts to massive audiences. When I need to explain microblogging, this is the way I do it. If I have to still explain FaceBook: oi.
The word microblogging should probably fall by the wayside in time: too cumbersome. High environmental impact.