Google spent two years in developing Buzz, so many at Google use it, incl. Brin and Page.

That means it's very easy to find a Google engineer, see his list of contacts, and read all of their Buzz notes.

Want to keep up on their chat? Just click Follow and you'll get a feed of their internal discussions at Google.

This is a massive security hole into Google.

Most corporations will ban their staff from using Buzz.