Some really love it, others hate it more than everything else. It is Twitter. Maybe you know this very famous microblogging platform. I had some time this saturday so i've set up an microblogging platform at http://scoutlink.net/micro/
So what's that? You could post messages (max 140 characters long). And write there everything (almost, you maybe know what i mean, i don't want to see there any illegal things etc).