Facebook’s latest offering is the Facebook Email Service which is claimed to be the Gmail or Yahoo mail killer because of the quick emailing and social connectivity features. In order to get a email address like firstname.lastname@example.org which is similar to gmail.com service, its suggested to check out the following tip.
To set up a free @facebook.com address, go to your Messages view and click the “Claim your Facebook email” link. Your email address will match your public username, for example:
If you don’t have a username yet, you can choose one when you create your email address.
Once you set up your email address, people can email you using any traditional email system (e.g., Hotmail, Yahoo or Gmail), and the emails will be delivered to your Facebook Messages. When you send messages to external email addresses, the emails will be formatted to look like Facebook messages, including your name, your profile picture and your message.
Since, the service is not yet launched to the public, its expected to soon because a hit because everyone who has a facebook custom URL would get the same name @ facebook.com email address for free of cost.