Google's My History service

Looks like Google are at it again (note: They have a must read blog). If you go to http://www.google.com/searchhistory/ you can sign up for a new Google Account. Which can also be your Gmail, Froogle or a number of other accounts that Google have, I found this out later, I initially setup another account with the same email address I had used for Gmail and it did not say anything about a duplicate? Bit strange? Anyway - the service Google are releasing allows you to review the history of all your Google searches. It allows you to view a calendar graphic you can use to navigate through all your search requests.