My coworker Kurt was asking about this so I’ll post it up here:
If you have Firefox and GreaseMonkey, then install this script. Go to your Facebook Phonebook, then in your Firefox menu, go into Tools > GreaseMonkey > User Script Commands… > and you’ll see Export Facebook Phonebook. Extract the data, and then POST it to AddressBooker, which will then guide you through merging it into your Google Contacts.
Script by Brad.
Talk to me, Goose.