How to Get Facebook Email Address
Facebook has just new features in which it will give email addresses to users ,at this time facebook email id is not open to everyone ,you have to request invittation.In order to get a invite to this new service you need to visit following  link where in you would be asked to click on the ‘Request Invite’ button.
http://www.facebook.com/about/messages/


if you are lucky you will get the yourname@facebook.com email id as soon as possible .Please note that Your email address will match your public username, for example:
Profile: facebook.com/username
Then your email address will be
Email: username@facebook.com
If you don’t have a username you can go here facebook.com/username/ to get or click below
http://www.facebook.com/username/