Google Plus vs Buzz. I haven't thought this all the way though yet but here's a theory about how the two might co-exist in the near future.
G+ is for content origination on Google. And for reading and commenting on that original content
Buzz is for aggregating all the content that originates elsewhere. While still allowing new conversations on that content.
This is something like Twitter + Friendfeed. Twitter was where you post to start with. Friendfeed is where you have the conversation about that, and all the other stuff.
For 18 months now those of us who liked Buzz hated the people who imported Twitter (and all the rest) into their Buzz streams but never talked back. We quickly learnt to just shut them out. What we need Google to do now is to make it easy and encourage people to import as much as possible into Buzz and then use Circles Sparks and future filter tools to make it manageable. That way Buzz has a purpose, post G+ and it can sit side by side with G+
ps. I forgot to geo-locate this post, dammit, and now I can't add a location when editing it. That ought to be automatic and it ought to be possible to add a location later.
RE: Friendfeed - I stopped using that very quickly and I don't know why. I guess I loved the origination more than the discussion. Here, I prefer discussion, as do I on FB about trivial things like Cracked.com articles...
Now that Google + is here I'm seeing migration of people I know from blogs and Twitter so there is a fairly interactive environment here, and I think it's worked out well that I can direct anyone who is interested in me to the Buzz tab on profile where they will see what has taken my from day to day over the months. But I won't pretend that's how I planned it.
In fact yesterday I posted on my public Google + stream to suggest that more people use Buzz in that way, leaving their output to circles clear for original content or extensive comments on imported content with a view to stimulating discussion on the streams.
The sad truth is that I've had to stop following one excellent fellow, a technology journalist, because he is churning out links to external content fast and this overwhelmed everything else. On Twitter that is fine, but it doesn't work here.
One suggestion for this is to put such people in a "NoisyBastards" circle and only look at it occasionally.
I did experiment with a "noisy" circle but quickly decided that the best policy was to keep the stream clear, which means noisy people get dumped. It's the same policy I follow on Twitter. Noisy people have a disproportionate negative impact on the stream and thus on your experience of Google+.