Where is the privacy Google BUZZ ?

Lately , the Google company have presented their new brand product , Google Buzz . Though, it seems that Buzz is an interesting technology , the level of privacy is awful ! As soon as I award this problem, I turned it off . Mail address is a key in privacy and personal stuff and Google should think about it more conservative . I Hope they fix this problem soon ....

Update 1: This is the first attempt of Google to fix the problem .