I still use it about once a day. I keep up with news and various developments on it. A couple of friends too, but mostly to keep up with android developers and such. I have noticed that more and more of my friends are using it, and the post counts are going up, but it is very slow.
I think that Google would serve themselves well by creating an app that posts to/pulls from both your FB and your G+ account (if such a thing doesn't exist).
--I think that is what HTC friendstream might be, but I am not sure.