When you’re at Google and switch to Settings → Google account settings you may now (if it’s already rolled out for you, that is) see a link to Google Dashboard reading “View data stored with this account”. After logging in with your credentials, Dashboard presents you with a detailed list of Google services and the associated data you’re storing with it. Each item, like Blogger, Google Calendar, Gmail, Google Health and so on contains a couple of lines of sample data, as well as links to edit your profile for that service, view the service’s privacy policy and more.