There are many ways to export your Facebook friends Email ids.
1)Search for Application in Facebook called "Export Contacts" and you will see different application in Facebook.
2)One application is there called Export Friends which will export your friend names.
3)There are social plugins that can sync photos and status updates of your Facebook friends with matching contacts in Outlook.
4)Very short and effective way is go to address.yahoo.com.Click Facebook Icon.One Popup come up,Log in.
Export whole Facebook Contact to Yahoo and then once this completed then click here.
Great you have finished your job........