If you are one of those people that totally are into life feeds/streams of… well anything then you will perhaps be interested in Sweetcron. It’s one of those hip lifestream tools - but if you’re a bit paranoid about your personal data (like me) than you probably would rather host something like that yourself.
Well with this thing you can.
By the way I didn’t play with it yet but it looks like I’d like to. :P