There are three main categories of existing content structures that I'm interested in so far:
I think of these as separate communities. With ThoughtStreams being yet another (and affording new content structures).
Right now, my tweets are auto-posted to Facebook, which I like. So Twitter integration will automatically give me Facebook integration too, at least for the tweet-size thoughts.
Eventually ThoughtStreams may work well for blog posts, but I'm guessing that I'll continue to author those directly in Wordpress (but perhaps announce them over in ThoughtStreams, and effectively Twitter/Facebook/G+).