Using another gmail account, I tried to discover what is being exposed via Buzz about my primary gmail account. Other than have one follow the other, I couldn't see anything that wasn't already exposed through my Google Profile. I don't use Google Reader for anything besides RSS, and even so, I don't refer to it any more (I use FriendFeed for RSS).
There must be particular kinds or sets of data that are exposed by Buzz, and I must not have contributed anything to those corpi. Some particular things that don't seem to have been made public via Buzz: my gmail contact list; any of my email, sent or received; Google Groups postings; any Google Chat conversations; nothing about or from my Google Wave account; Google Reader subscribed feeds.
There must be particular kinds or sets of data that are exposed by Buzz, and I must not have contributed anything to those corpi. Some particular things that don't seem to have been made public via Buzz: my gmail contact list; any of my email, sent or received; Google Groups postings; any Google Chat conversations; nothing about or from my Google Wave account; Google Reader subscribed feeds.