I love the concept of Buzz. My problems are that the people I want to follow are still on Twitter, and that the “big time” users always have their stuff float to the top of my feed (or have they fixed that?).
Google apparently announced a Buzz API at the recent developers’ conference, so maybe we’ll start seeming some clients that work with both Buzz and Twitter at the same time. That would probably get me using it again. The issue now is that Buzz is just one more network to stay on top of, but if it were seamless with another, like Twitter, via a 3rd party app, that would solve that problem.