I heard rumors that G+ was headed that way, but I haven't seen anything to support it. I haven't used it as much as I thought I would, so I wouldn't be surprised.
Facebook is getting on my nerves-- FB staff seem hell-bent on making it near impossible to keep on top of any security-related issues. Every time I set things the way I want it, they decide that it's time to shake things up and I'm back to figuring out what they changed and what (if anything) I have to do to prevent unwanted eyes from seeing it.
Diaspora... Well... I HOPED it would replace Facebook, but it didn't. Every time I logged-in I was accosted by dozens of images (mobile GIFs or something) from people that have one or more "similar interests", most of whom I couldn't communicate if I wanted to, simply because I don't speak their language. :\ I tried setting up my own node, but that didn't go as well as I had hoped.
So... I'm back here. We'll see how it goes. :)