I see that Address Book has a field for entering a friend's Facebook profile. However, many of my friends don't have an actual facebook username (ie a profile at facebook.com/username), but just the old user ID (facebook.com/profile.php?id=blah). Is there any way to make it work with those?
Also, how can I sync information from Facebook (eg birthdays) with my address book? Is there a way to do that and veto updates, like with iSync? Sometimes people have fake information on Facebook.