It seems to only sync the ones I have in my outlook contact list. I wonder if it is just displaying info on your computer, not necessarily public? (unless it is just coincidence the ones I see are people in my Outlook contacts and the ones not happen to have their privacy settings beefed up).
It seems logical that they are moving to the integration with Skype.
I don't use Outlook, and only access the internet via a desktop computer. When I followed the prompts, I saw phone numbers displayed for every 'friend' on my list.
Yes, these people had to have input those numbers into their Facebook profiles for them to show up like that, but I'm just wondering if most people understand that that information is accessible like this.
Perhaps some folks will see this alert and choose to not share their phone numbers this way.