Are you using a lot of Google services? I do! And I always felt a need for a centralized place where I can view summary of all the data of Google products that I use. Google has just launched this thing that is called Google Dashboard. The Google Dashboard allows you to view and control data associated with the different products you use with your Google Account. Not only it summarizes all of your Google accounts, but also makes you know what information Google has of you. Although it's still not on the Google homepage (It should be). You have to go to https://www.google.com/dashboard/ to access it.

Watch the official Google Dashboard video: