Believe it or not, I'm starting this blog because of Google Buzz. It's so remarkably interactive, and it's a stream built for you to dive into immediately. For interaction around high quality content, nothing beats it.
I started off trying to get my typepad blog, micro.budgibson.com, to work with buzz, but the social graph api just wouldn't cooperate. I may eventually incorporate the content from that blog here, but for now, I'm starting afresh (for like maybe the 25th time).