From the official Google blog:
"Have you ever wondered what data is stored with your Google Account? The Google Dashboard offers a simple view into the data associated with your account — easily and concisely in one location." See the video below:
"Designed to be simple and useful, the Dashboard summarizes data for each product that you use (when signed in to your account) and provides you direct links to control your personal settings. Dashboard covers more than 20 products and services, including Gmail, Calendar, Docs, Web History, Orkut, YouTube, Picasa, Talk, Reader, Alerts, Latitude and many more." Check out www.google.com/dashboard
This is a very useful service. It looks like I have 10,000 emails in Gmail and 399 RSS subscriptions in Google Reader.
Transparency, choice and control — now complete with a Dashboard!