Associate Email Address with Google Account
Google January 20th, 2008 - By HaochiGoogle added a new option that you can associate additional email addresses (that are not yet registered with Google) with your Google Account. You can find this new option under Edit Personal Information in the “My Account” page. To add an additional email address, simply enter your email address, click on the “Save” button below, and Google will send a verification email to the email address you enter.

Following the link in the email Google sent you will take you to a sign in page similar to the one above and ask you to enter your password to verify the association of the two email address on Google. Once you enter the (correct) password (and Google tells you that the “email address is now associated with your Google account”), you can use the additional email address to access your services/data on Google.
You can add as many email address you like (I suppose, at least at a reasonable number) and you can “disassociate this email address at any time” in the Edit Personal Information page.
I initially asked myself, “What’s the point of this?” and then something snapped, “Not everyone’s using Google as their primary ____ (insert Google product name here).”
[via Google Blogoscoped]


