I just took a look at my filtered-as-spam mail in my Gmail account, and saw a fake email claiming to be from eBay.
I opened it just to take a look and was greeted by a nice, big, red banner, added by Gmail, telling me that the message didn't actually come from eBay.
Take a look:
It also disabled the links in the email, that would have taken you to the information logging site.
What do you all think?
To me it seems a lot better that Microsoft's effort in Hotmail.