As much as I like the idea of only having to post something in one place to have it shared with people I think part of the reason I really like Google+ is because all of the content that is being shared there is original. Buzz was all about integrating your other feeds. G+ is doing very well by making people post original items.
Anybody posting their Twitter stream of consciousness to G+ is going to get unfollowed.
I routinely post anything I want to be publicly visible to Twitter. It's then forwarded to Facebook, LinkedIn and (soon) G+. If I want something visible only to my friends, I post it to FB (I keep the friend list there tidy) - hopefully I'll be able to forward those to my "Friends" and "Family" circles on G+.
I don't want to maintain yet another stream whenever there's a new social network thing going on. OTOH, I don't post my "stream of consciousness" to Tw, I try to use it as a broadcast medium. I am annoyed by "today I had X for lunch" type posts, be they on Tw, FB or G+.
I have a few friends who are linked to me on FB, Buzz, Twitter and LinkedIn. Issue is that I get the same messages in every medium and most of the time, they're not worth seeing 4 times :) I figure if someone wants my Twitter posts they'll follow me on Twitter.
I am wary of bots after Wave. The vibe of a conversation went downhill really quick.
I question too the utility of duplicating your posts twice. It's really hard to get it right without multiple overlapping groups of people seeing the same content twice. Plus the resulting fragmentation of discussion as well.
Is posting on two services really worse than posting only on one? At least people who are on one but not the other will get to see the post. Until G+ and FB make peace and inter-operate, this can't really be helped.
Not having any luck using AgentG in a circle to share, it always has to be shared directly with AgentG. i know there is a note about this during setup, but it seems to encourage you to add AgentG to a circle for regular use. This doesn't seem to work.