You can now login to any website that supports OpenID using your very own Google Account.

To create a custom OpenID URL with your Google Account username, go to appspot.com and login using your Google credentials. You will be assigned an OpenID sign-on that looks something like this:

http://openid-provider.appspot.com/abc@xyz.com where abc@xyz.com is the email address associated with your Google Account.

Google’s own Blogger platform also uses OpenID for comments. The OpenID system for Google Accounts has been implemented using the new Google App Engine.