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At least the Gmail access overview is a nice feature, far from being universal for all webmail providers. Every provider should have it.

It's a very good tool. Without it, I wouldn't even know about this possible intrusion.

They've also recently added suspicious activity alerts depending of geographic regions which I though was a nice touch: http://gmailblog.blogspot.com/2010/03/detecting-suspicious-a...

A very nice touch. About a month ago, I got an alert that my account had been accessed from China... Never would have known I was at risk otherwise.