How to enable Facebook contacts with phone numbers to get automatically added to Google Contacts (or some contacts organizer)? For Android 4.0.
Hey, this looks pretty neat: http://www.friendstogmail.com/.
Found it here: http://lifehacker.com/5807033/friends-to-gmail-exports-your-facebook-contacts-into-google-contacts
It won't just sync the phone numbers, though: it will sync everything. No idea how well it will work, but good luck.
Crap, just checked and this doesn't support phone numbers. Turns out Facebook doesn't offer a way for developers to do that. Sucks, but I guess you know now: this isn't currently possible.