Google has done lot of improvements in Google Buzz based on feedback. Below are some of them which are useful.

1. More visible option to not show followers/people you follow on your public profile
If you don't want to share the lists of people who are following you and people you are following publicly on your profile, you can always opt out during the profile set-up when you first use Buzz or at any time from the edit profile page. We are making this option more prominent in the set up process, to ensure everyone who wanted to hide these lists can do so easily.



2. Ability to block anyone who starts following you
We are making it easier to block anyone, by adding "Block" links to the list of people following you. Previously, you were only able to block people from following you after they had created a public profile. Now, you can block anyone, regardless of whether or not they've already created profiles for themselves.



3. More clarity on which of your followers/people you follow can appear on your public profile
Initially, we showed you a list of all the people who would be following you once they created a public profile. However, only those contacts who had already created a public profile would show up on your public follower list. We're making this clearer by explicitly distinguishing which of your followers have public profiles and will show in your public list of followers. With this change you'll be able to see who is on the public list of followers that everyone else sees.



Official Gmail Blog: Millions of Buzz users, and improvements based on your feedback