I hate to sound curmudgeonly, because I'm really not, but I do not like the new Buzz.
I don't twitter and don't text and RARELY chat, so when Buzz popped up in my google account it was at best, annoying. What really gets me is that they built this system on my e-mail contacts, assumed I wanted to follow people and people wanted to follow me, and did it peremptorily, rather than asking if I wanted to opt-in. Even an "opt-out" button would have been nice. Instead, to get it to turn off one has to jump through a few hoops.
In most other respects, I LOVE Google. I even have stock in the company! I believe very strongly in their corporate structure and goals. But this is a bit creepy and paternalistic to assume that everyone wants to do things their way.
Here's a good article on how to get rid of it if you want to do so. KILL BUZZ