The URL that is needed is: https://www.google.com/accounts/o8/id — and it’s the same for everyone who has a Google account. So when they ask for your OpenID, just copy and paste that URL. (It may send you to Google to verify that you want that site to be able to log you in).
Using OpenID with Gmail and Google Accounts
Next post: Show Hidden Files on a Mac
Previous post: Including eps figures into LaTeX