Using Google Buzz Can Expose Your Gmail Address
by theharmonyguy on February 12th, 2010
I've discovered another trick that may surprise some, this time relating to Google's services. I don't view the issue as a vulnerability, but it likely goes against user privacy expectations. In short, having a public Google profile (which you might have created when checking out Google Buzz) can allow others to figure out your Gmail address.
This really shouldn't be that surprising, given that your username is generally consistent across Google services, and a public profile is public. But those who currently have numeric profile addresses (e.g.