We use gmail for our mail over at Not That This, so this new feature looks great. I’m glad they are exposing this stuff

From the gmail blog, “Your email account can contain a lot of personal information, from bank alerts to love letters. Email that, I’m sure, you don’t always want other people to see. We understand how important your Gmail accounts are to you, so we’re adding a new layer of information and control. With this new feature, you can now track your recent sessions and you can also sign yourself out remotely.”

Read about it here:

http://gmailblog.blogspot.com/2008/07/remote-sign-out-and-info-to-help-you.html

And the details:

http://gmailblog.blogspot.com/2010/03/detecting-suspicious-account-activity.html