Google Buzz and Privacy Settings

This is interesting. Google Buzz is definitely experiencing a higher adoption rate than twitter, since it's more mainstream. Almost everyone I know has a Gmail account, and Buzz automatically adds your Gchat friends to your Buzz.

Some privacy issues before people get too happy with Buzz..
1. You can restrict your posts to only certain groups of people. That is extremely useful especially for me, as I have professional and personal contacts in my gmail account. Look at the right of the "Post" button, and you can choose either the "Public"/"Private" option. You can control the "Private" option using the "Groups" feature in your Gmail Contacts settings. (I'm assuming everyone knows how to create contact Groups in Gmail. If not, http://mail.google.com/support/bin/answer.py?hl=en&answer=30970)
2. Apparently, you cannot post a Public "Post" in Buzz without allowing your profile to be public. Hmm..?
3. Look carefully at the info you are putting on your profile page. It might not be good to have all the info listed, much as you like feeding the Google machine.
4. You can block people from your updates.
5. Uncheck the Share Your Followers option.
6. Try not to use the personal profile URL. That will reveal your Gmail address to the world.

I'm still figuring out how to:
1. Group the updates according to contact group

User interface is a bit clunky, like what Dingyan commented.
It's a rather inefficient use of space, compared to twitter.

Anyway,
The Google Buzz API is here: http://code.google.com/apis/buzz/

The next titanic battle might be between Google and Facebook, not Google and Microsoft anymore. It's already happening with their executive hires.

I'm waiting for the China clone.. =)